./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/array_shadowinit.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/array-industry-pattern/array_shadowinit.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 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 18:18:15,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 18:18:15,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 18:18:15,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 18:18:15,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 18:18:15,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 18:18:15,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 18:18:15,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 18:18:15,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 18:18:15,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 18:18:15,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 18:18:15,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 18:18:15,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 18:18:15,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 18:18:15,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 18:18:15,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 18:18:15,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 18:18:15,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 18:18:15,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 18:18:15,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 18:18:15,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 18:18:15,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 18:18:15,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 18:18:15,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 18:18:15,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 18:18:15,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 18:18:15,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 18:18:15,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 18:18:15,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 18:18:15,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 18:18:15,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 18:18:15,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 18:18:15,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 18:18:15,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 18:18:15,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 18:18:15,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 18:18:15,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 18:18:15,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 18:18:15,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 18:18:15,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 18:18:15,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 18:18:15,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 18:18:16,015 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 18:18:16,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 18:18:16,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 18:18:16,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 18:18:16,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 18:18:16,016 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 18:18:16,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 18:18:16,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 18:18:16,017 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 18:18:16,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 18:18:16,018 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 18:18:16,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 18:18:16,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 18:18:16,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 18:18:16,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 18:18:16,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 18:18:16,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 18:18:16,019 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 18:18:16,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 18:18:16,019 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 18:18:16,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 18:18:16,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 18:18:16,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 18:18:16,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 18:18:16,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:18:16,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 18:18:16,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 18:18:16,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 18:18:16,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 18:18:16,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 18:18:16,021 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 18:18:16,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 18:18:16,021 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 18:18:16,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 18:18:16,022 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 18:18:16,022 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 [2023-02-15 18:18:16,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 18:18:16,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 18:18:16,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 18:18:16,201 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 18:18:16,202 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 18:18:16,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2023-02-15 18:18:17,055 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 18:18:17,261 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 18:18:17,262 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2023-02-15 18:18:17,267 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9705078f/d1b7134d586f41f8a465a5cb9536b623/FLAG9b10c1c18 [2023-02-15 18:18:17,279 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9705078f/d1b7134d586f41f8a465a5cb9536b623 [2023-02-15 18:18:17,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 18:18:17,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 18:18:17,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 18:18:17,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 18:18:17,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 18:18:17,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:18:17" (1/1) ... [2023-02-15 18:18:17,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a0e719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17, skipping insertion in model container [2023-02-15 18:18:17,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:18:17" (1/1) ... [2023-02-15 18:18:17,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 18:18:17,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 18:18:17,422 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i[809,822] [2023-02-15 18:18:17,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:18:17,441 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 18:18:17,449 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i[809,822] [2023-02-15 18:18:17,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:18:17,465 INFO L208 MainTranslator]: Completed translation [2023-02-15 18:18:17,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17 WrapperNode [2023-02-15 18:18:17,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 18:18:17,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 18:18:17,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 18:18:17,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 18:18:17,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17" (1/1) ... [2023-02-15 18:18:17,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17" (1/1) ... [2023-02-15 18:18:17,490 INFO L138 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2023-02-15 18:18:17,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 18:18:17,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 18:18:17,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 18:18:17,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 18:18:17,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17" (1/1) ... [2023-02-15 18:18:17,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17" (1/1) ... [2023-02-15 18:18:17,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17" (1/1) ... [2023-02-15 18:18:17,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17" (1/1) ... [2023-02-15 18:18:17,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17" (1/1) ... [2023-02-15 18:18:17,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17" (1/1) ... [2023-02-15 18:18:17,513 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17" (1/1) ... [2023-02-15 18:18:17,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17" (1/1) ... [2023-02-15 18:18:17,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 18:18:17,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 18:18:17,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 18:18:17,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 18:18:17,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17" (1/1) ... [2023-02-15 18:18:17,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:18:17,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:17,541 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 18:18:17,564 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 18:18:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 18:18:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 18:18:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 18:18:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 18:18:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 18:18:17,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 18:18:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 18:18:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 18:18:17,628 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 18:18:17,629 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 18:18:17,733 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 18:18:17,737 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 18:18:17,740 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 18:18:17,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:18:17 BoogieIcfgContainer [2023-02-15 18:18:17,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 18:18:17,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 18:18:17,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 18:18:17,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 18:18:17,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 06:18:17" (1/3) ... [2023-02-15 18:18:17,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a728d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:18:17, skipping insertion in model container [2023-02-15 18:18:17,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:18:17" (2/3) ... [2023-02-15 18:18:17,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a728d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:18:17, skipping insertion in model container [2023-02-15 18:18:17,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:18:17" (3/3) ... [2023-02-15 18:18:17,746 INFO L112 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2023-02-15 18:18:17,758 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 18:18:17,758 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 18:18:17,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 18:18:17,798 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;@1c94fb96, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 18:18:17,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 18:18:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 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 18:18:17,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 18:18:17,804 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:17,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:17,805 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:17,810 INFO L85 PathProgramCache]: Analyzing trace with hash 126038137, now seen corresponding path program 1 times [2023-02-15 18:18:17,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:17,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95685128] [2023-02-15 18:18:17,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:17,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:17,939 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 18:18:17,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:17,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95685128] [2023-02-15 18:18:17,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95685128] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:18:17,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:18:17,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 18:18:17,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220484055] [2023-02-15 18:18:17,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:18:17,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 18:18:17,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:17,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 18:18:17,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:18:17,970 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 18:18:17,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:17,981 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-02-15 18:18:17,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 18:18:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 18:18:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:17,988 INFO L225 Difference]: With dead ends: 26 [2023-02-15 18:18:17,989 INFO L226 Difference]: Without dead ends: 10 [2023-02-15 18:18:17,991 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 18:18:17,995 INFO L413 NwaCegarLoop]: 17 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, 17 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 18:18:17,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:18:18,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-02-15 18:18:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-02-15 18:18:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 18:18:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-02-15 18:18:18,018 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2023-02-15 18:18:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:18,018 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-02-15 18:18:18,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 18:18:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-02-15 18:18:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 18:18:18,019 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:18,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:18,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 18:18:18,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:18,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:18,021 INFO L85 PathProgramCache]: Analyzing trace with hash 122344053, now seen corresponding path program 1 times [2023-02-15 18:18:18,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:18,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71215245] [2023-02-15 18:18:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:18,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:18,146 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 18:18:18,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:18,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71215245] [2023-02-15 18:18:18,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71215245] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:18:18,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:18:18,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 18:18:18,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617420722] [2023-02-15 18:18:18,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:18:18,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:18:18,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:18,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:18:18,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:18:18,149 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 18:18:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:18,174 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2023-02-15 18:18:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:18:18,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 18:18:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:18,175 INFO L225 Difference]: With dead ends: 17 [2023-02-15 18:18:18,175 INFO L226 Difference]: Without dead ends: 11 [2023-02-15 18:18:18,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:18:18,177 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:18,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:18:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-15 18:18:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-15 18:18:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 18:18:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-02-15 18:18:18,180 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2023-02-15 18:18:18,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:18,180 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-02-15 18:18:18,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 18:18:18,180 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-02-15 18:18:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 18:18:18,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:18,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:18,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 18:18:18,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:18,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:18,182 INFO L85 PathProgramCache]: Analyzing trace with hash -450855509, now seen corresponding path program 1 times [2023-02-15 18:18:18,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:18,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454478377] [2023-02-15 18:18:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:18,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:18,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:18,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454478377] [2023-02-15 18:18:18,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454478377] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:18,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739449481] [2023-02-15 18:18:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:18,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:18,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:18,507 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 18:18:18,508 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 18:18:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:18,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 18:18:18,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:18,586 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 19 treesize of output 15 [2023-02-15 18:18:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:18,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:18,643 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 14 treesize of output 12 [2023-02-15 18:18:18,645 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 22 treesize of output 20 [2023-02-15 18:18:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:18,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739449481] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:18,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:18,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-02-15 18:18:18,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657835879] [2023-02-15 18:18:18,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:18,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 18:18:18,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:18,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 18:18:18,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-02-15 18:18:18,656 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 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 18:18:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:18,702 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2023-02-15 18:18:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 18:18:18,703 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 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 9 [2023-02-15 18:18:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:18,703 INFO L225 Difference]: With dead ends: 17 [2023-02-15 18:18:18,703 INFO L226 Difference]: Without dead ends: 15 [2023-02-15 18:18:18,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-15 18:18:18,704 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:18,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 27 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:18:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-15 18:18:18,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2023-02-15 18:18:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 18:18:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-02-15 18:18:18,707 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-02-15 18:18:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:18,708 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-02-15 18:18:18,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 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 18:18:18,708 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-02-15 18:18:18,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 18:18:18,708 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:18,709 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:18,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 18:18:18,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:18,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:18,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:18,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1068940558, now seen corresponding path program 1 times [2023-02-15 18:18:18,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:18,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786830380] [2023-02-15 18:18:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:18,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:18,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:18,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786830380] [2023-02-15 18:18:18,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786830380] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:18,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905659021] [2023-02-15 18:18:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:18,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:18,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:18,970 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 18:18:18,972 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 18:18:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:19,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:18:19,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:19,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:19,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905659021] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:19,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:19,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-15 18:18:19,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251094522] [2023-02-15 18:18:19,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:19,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 18:18:19,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 18:18:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 18:18:19,068 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 18:18:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:19,114 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-02-15 18:18:19,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 18:18:19,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 12 [2023-02-15 18:18:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:19,115 INFO L225 Difference]: With dead ends: 30 [2023-02-15 18:18:19,115 INFO L226 Difference]: Without dead ends: 20 [2023-02-15 18:18:19,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-15 18:18:19,116 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:19,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 26 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:18:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-15 18:18:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2023-02-15 18:18:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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 18:18:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-02-15 18:18:19,119 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2023-02-15 18:18:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:19,119 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-02-15 18:18:19,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 18:18:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-02-15 18:18:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 18:18:19,120 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:19,120 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:19,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 18:18:19,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-15 18:18:19,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:19,325 INFO L85 PathProgramCache]: Analyzing trace with hash 407528232, now seen corresponding path program 2 times [2023-02-15 18:18:19,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:19,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100406360] [2023-02-15 18:18:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:19,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:19,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:19,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100406360] [2023-02-15 18:18:19,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100406360] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:19,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183516881] [2023-02-15 18:18:19,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:18:19,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:19,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:19,505 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 18:18:19,507 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 18:18:19,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:18:19,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:19,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 18:18:19,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:19,560 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 13 treesize of output 9 [2023-02-15 18:18:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:19,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:19,646 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 14 [2023-02-15 18:18:19,648 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 24 treesize of output 20 [2023-02-15 18:18:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:19,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183516881] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:19,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:19,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-02-15 18:18:19,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058176733] [2023-02-15 18:18:19,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:19,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 18:18:19,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:19,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 18:18:19,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-02-15 18:18:19,658 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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 18:18:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:19,741 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-02-15 18:18:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 18:18:19,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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 18:18:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:19,742 INFO L225 Difference]: With dead ends: 21 [2023-02-15 18:18:19,742 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 18:18:19,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-02-15 18:18:19,743 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:19,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 43 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:18:19,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 18:18:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2023-02-15 18:18:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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 18:18:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-02-15 18:18:19,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2023-02-15 18:18:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:19,746 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-02-15 18:18:19,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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 18:18:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-02-15 18:18:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 18:18:19,747 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:19,747 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:19,753 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 18:18:19,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:19,953 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:19,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1194192811, now seen corresponding path program 3 times [2023-02-15 18:18:19,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:19,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064340800] [2023-02-15 18:18:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:19,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:20,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:20,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064340800] [2023-02-15 18:18:20,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064340800] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:20,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186293445] [2023-02-15 18:18:20,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:18:20,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:20,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:20,045 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 18:18:20,047 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 18:18:20,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 18:18:20,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:20,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:18:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:20,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:20,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186293445] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:20,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:20,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-15 18:18:20,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476414332] [2023-02-15 18:18:20,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:20,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 18:18:20,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:20,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 18:18:20,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:18:20,166 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 18:18:20,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:20,216 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-02-15 18:18:20,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 18:18:20,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) Word has length 16 [2023-02-15 18:18:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:20,217 INFO L225 Difference]: With dead ends: 37 [2023-02-15 18:18:20,217 INFO L226 Difference]: Without dead ends: 24 [2023-02-15 18:18:20,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-15 18:18:20,218 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:20,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 33 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:18:20,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-15 18:18:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2023-02-15 18:18:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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 18:18:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-02-15 18:18:20,229 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2023-02-15 18:18:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:20,229 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-02-15 18:18:20,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 18:18:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-02-15 18:18:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 18:18:20,230 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:20,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:20,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 18:18:20,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:20,434 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:20,434 INFO L85 PathProgramCache]: Analyzing trace with hash -298048117, now seen corresponding path program 4 times [2023-02-15 18:18:20,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:20,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910109687] [2023-02-15 18:18:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:20,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:20,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:20,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910109687] [2023-02-15 18:18:20,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910109687] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:20,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244761332] [2023-02-15 18:18:20,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:18:20,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:20,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:20,617 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 18:18:20,699 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 18:18:20,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:18:20,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:20,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-15 18:18:20,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:20,737 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 15 treesize of output 11 [2023-02-15 18:18:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:20,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:20,897 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 14 [2023-02-15 18:18:20,900 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 24 treesize of output 20 [2023-02-15 18:18:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:20,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244761332] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:20,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:20,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 16 [2023-02-15 18:18:20,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49602119] [2023-02-15 18:18:20,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:20,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 18:18:20,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:20,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 18:18:20,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-02-15 18:18:20,920 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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 18:18:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:21,050 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-02-15 18:18:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 18:18:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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 17 [2023-02-15 18:18:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:21,052 INFO L225 Difference]: With dead ends: 25 [2023-02-15 18:18:21,052 INFO L226 Difference]: Without dead ends: 23 [2023-02-15 18:18:21,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-02-15 18:18:21,053 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:21,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 46 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:18:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-15 18:18:21,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-02-15 18:18:21,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 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 18:18:21,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-02-15 18:18:21,060 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2023-02-15 18:18:21,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:21,060 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-02-15 18:18:21,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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 18:18:21,060 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-02-15 18:18:21,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 18:18:21,061 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:21,061 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:21,081 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 18:18:21,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:21,266 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:21,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1449259246, now seen corresponding path program 5 times [2023-02-15 18:18:21,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:21,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120361878] [2023-02-15 18:18:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:21,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:21,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:21,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120361878] [2023-02-15 18:18:21,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120361878] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:21,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235869888] [2023-02-15 18:18:21,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:18:21,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:21,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:21,335 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 18:18:21,368 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 18:18:21,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 18:18:21,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:21,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 18:18:21,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:21,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:21,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235869888] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:21,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:21,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-15 18:18:21,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740491351] [2023-02-15 18:18:21,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:21,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 18:18:21,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:21,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 18:18:21,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-15 18:18:21,505 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 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 18:18:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:21,562 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-02-15 18:18:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 18:18:21,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 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 20 [2023-02-15 18:18:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:21,564 INFO L225 Difference]: With dead ends: 44 [2023-02-15 18:18:21,564 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 18:18:21,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-02-15 18:18:21,566 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:21,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 44 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:18:21,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 18:18:21,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2023-02-15 18:18:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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 18:18:21,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-02-15 18:18:21,573 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2023-02-15 18:18:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:21,573 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-02-15 18:18:21,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 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 18:18:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-02-15 18:18:21,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 18:18:21,574 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:21,574 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:21,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 18:18:21,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:21,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:21,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:21,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1156487496, now seen corresponding path program 6 times [2023-02-15 18:18:21,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:21,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299810471] [2023-02-15 18:18:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:21,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:22,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:22,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299810471] [2023-02-15 18:18:22,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299810471] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:22,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037305070] [2023-02-15 18:18:22,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:18:22,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:22,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:22,062 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 18:18:22,075 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 18:18:22,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 18:18:22,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:22,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 18:18:22,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:22,180 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 13 treesize of output 9 [2023-02-15 18:18:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:22,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:22,359 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 14 [2023-02-15 18:18:22,360 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 24 treesize of output 20 [2023-02-15 18:18:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:22,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037305070] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:22,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:22,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 25 [2023-02-15 18:18:22,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220466251] [2023-02-15 18:18:22,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:22,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 18:18:22,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:22,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 18:18:22,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2023-02-15 18:18:22,372 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 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 18:18:22,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:22,511 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2023-02-15 18:18:22,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 18:18:22,512 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 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 21 [2023-02-15 18:18:22,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:22,512 INFO L225 Difference]: With dead ends: 29 [2023-02-15 18:18:22,512 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 18:18:22,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 18:18:22,513 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:22,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:18:22,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 18:18:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-02-15 18:18:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 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 18:18:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-02-15 18:18:22,516 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2023-02-15 18:18:22,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:22,516 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-02-15 18:18:22,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 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 18:18:22,517 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-02-15 18:18:22,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 18:18:22,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:22,517 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:22,524 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 18:18:22,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:22,722 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:22,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:22,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1303861707, now seen corresponding path program 7 times [2023-02-15 18:18:22,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:22,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243349285] [2023-02-15 18:18:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:22,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:22,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243349285] [2023-02-15 18:18:22,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243349285] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:22,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793494576] [2023-02-15 18:18:22,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:18:22,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:22,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:22,843 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 18:18:22,845 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 18:18:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:22,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 18:18:22,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:22,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:23,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793494576] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:23,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:23,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-02-15 18:18:23,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223792034] [2023-02-15 18:18:23,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:23,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 18:18:23,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:23,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 18:18:23,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-02-15 18:18:23,049 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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 18:18:23,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:23,130 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-02-15 18:18:23,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 18:18:23,131 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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) Word has length 24 [2023-02-15 18:18:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:23,131 INFO L225 Difference]: With dead ends: 51 [2023-02-15 18:18:23,131 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 18:18:23,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-02-15 18:18:23,132 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:23,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:18:23,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 18:18:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2023-02-15 18:18:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 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 18:18:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-02-15 18:18:23,136 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2023-02-15 18:18:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:23,136 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-02-15 18:18:23,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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 18:18:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-02-15 18:18:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 18:18:23,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:23,137 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:23,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 18:18:23,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 18:18:23,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:23,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:23,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1052957333, now seen corresponding path program 8 times [2023-02-15 18:18:23,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:23,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151515562] [2023-02-15 18:18:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:23,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:23,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:23,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151515562] [2023-02-15 18:18:23,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151515562] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:23,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768195645] [2023-02-15 18:18:23,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:18:23,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:23,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:23,710 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 18:18:23,721 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 18:18:23,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:18:23,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:23,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 18:18:23,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:23,789 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 15 treesize of output 11 [2023-02-15 18:18:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:23,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:24,037 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 14 [2023-02-15 18:18:24,039 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 24 treesize of output 20 [2023-02-15 18:18:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:24,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768195645] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:24,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:24,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2023-02-15 18:18:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087840959] [2023-02-15 18:18:24,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:24,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 18:18:24,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:24,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 18:18:24,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2023-02-15 18:18:24,115 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 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 18:18:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:24,372 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-02-15 18:18:24,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 18:18:24,373 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 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 25 [2023-02-15 18:18:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:24,373 INFO L225 Difference]: With dead ends: 33 [2023-02-15 18:18:24,373 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 18:18:24,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 18:18:24,374 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:24,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 119 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:18:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 18:18:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-02-15 18:18:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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 18:18:24,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-02-15 18:18:24,379 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2023-02-15 18:18:24,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:24,379 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-02-15 18:18:24,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 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 18:18:24,380 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-02-15 18:18:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 18:18:24,380 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:24,380 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:24,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 18:18:24,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:24,585 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:24,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1794016050, now seen corresponding path program 9 times [2023-02-15 18:18:24,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:24,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070566234] [2023-02-15 18:18:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:24,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:24,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:24,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070566234] [2023-02-15 18:18:24,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070566234] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:24,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593917036] [2023-02-15 18:18:24,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:18:24,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:24,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:24,726 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 18:18:24,752 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 18:18:24,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 18:18:24,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:24,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 18:18:24,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:24,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:25,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593917036] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:25,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:25,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-02-15 18:18:25,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378174994] [2023-02-15 18:18:25,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:25,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 18:18:25,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:25,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 18:18:25,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-02-15 18:18:25,002 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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 18:18:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:25,091 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2023-02-15 18:18:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 18:18:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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 18:18:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:25,092 INFO L225 Difference]: With dead ends: 58 [2023-02-15 18:18:25,092 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 18:18:25,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-02-15 18:18:25,093 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:25,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 52 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:18:25,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 18:18:25,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-02-15 18:18:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 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 18:18:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2023-02-15 18:18:25,097 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2023-02-15 18:18:25,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:25,097 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2023-02-15 18:18:25,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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 18:18:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2023-02-15 18:18:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 18:18:25,097 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:25,097 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:25,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-15 18:18:25,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 18:18:25,303 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:25,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:25,303 INFO L85 PathProgramCache]: Analyzing trace with hash -528189592, now seen corresponding path program 10 times [2023-02-15 18:18:25,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:25,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766473920] [2023-02-15 18:18:25,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:25,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:25,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:25,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766473920] [2023-02-15 18:18:25,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766473920] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:25,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328276701] [2023-02-15 18:18:25,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:18:25,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:25,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:25,586 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 18:18:25,588 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 18:18:25,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:18:25,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:25,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 18:18:25,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:25,674 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 15 treesize of output 11 [2023-02-15 18:18:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:25,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:25,909 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 14 [2023-02-15 18:18:25,911 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 24 treesize of output 20 [2023-02-15 18:18:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:25,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328276701] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:25,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:25,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 25 [2023-02-15 18:18:25,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041978826] [2023-02-15 18:18:25,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:25,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 18:18:25,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:25,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 18:18:25,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2023-02-15 18:18:25,931 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 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 18:18:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:26,194 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2023-02-15 18:18:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 18:18:26,194 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 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 29 [2023-02-15 18:18:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:26,195 INFO L225 Difference]: With dead ends: 37 [2023-02-15 18:18:26,195 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 18:18:26,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 18:18:26,196 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:26,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 113 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:18:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 18:18:26,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-02-15 18:18:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 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 18:18:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-02-15 18:18:26,200 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2023-02-15 18:18:26,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:26,201 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-02-15 18:18:26,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 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 18:18:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-02-15 18:18:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 18:18:26,201 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:26,202 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:26,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 18:18:26,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 18:18:26,407 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:26,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:26,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1468830741, now seen corresponding path program 11 times [2023-02-15 18:18:26,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:26,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988469236] [2023-02-15 18:18:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:26,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:26,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:26,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988469236] [2023-02-15 18:18:26,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988469236] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:26,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540848904] [2023-02-15 18:18:26,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:18:26,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:26,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:26,616 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 18:18:26,647 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 18:18:26,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-15 18:18:26,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:26,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 18:18:26,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:26,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:26,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540848904] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:26,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:26,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-02-15 18:18:26,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151910159] [2023-02-15 18:18:26,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:26,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 18:18:26,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:26,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 18:18:26,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-02-15 18:18:26,968 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 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 18:18:27,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:27,070 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2023-02-15 18:18:27,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 18:18:27,070 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 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 32 [2023-02-15 18:18:27,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:27,071 INFO L225 Difference]: With dead ends: 65 [2023-02-15 18:18:27,071 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 18:18:27,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 18:18:27,072 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:27,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 63 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:18:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 18:18:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-02-15 18:18:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 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 18:18:27,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2023-02-15 18:18:27,076 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2023-02-15 18:18:27,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:27,076 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2023-02-15 18:18:27,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 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 18:18:27,077 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2023-02-15 18:18:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 18:18:27,077 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:27,077 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:27,084 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 18:18:27,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 18:18:27,282 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:27,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1812036939, now seen corresponding path program 12 times [2023-02-15 18:18:27,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:27,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976919047] [2023-02-15 18:18:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:27,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:27,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:27,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976919047] [2023-02-15 18:18:27,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976919047] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:27,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153355381] [2023-02-15 18:18:27,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:18:27,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:27,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:27,601 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 18:18:27,601 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 18:18:27,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 18:18:27,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:27,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-15 18:18:27,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:27,871 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 13 treesize of output 9 [2023-02-15 18:18:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:28,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:28,425 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 14 [2023-02-15 18:18:28,426 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 24 treesize of output 20 [2023-02-15 18:18:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:28,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153355381] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:28,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:28,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 53 [2023-02-15 18:18:28,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271147945] [2023-02-15 18:18:28,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:28,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 18:18:28,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:28,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 18:18:28,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2466, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 18:18:28,583 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 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 18:18:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:29,918 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2023-02-15 18:18:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-15 18:18:29,919 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 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 18:18:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:29,919 INFO L225 Difference]: With dead ends: 91 [2023-02-15 18:18:29,919 INFO L226 Difference]: Without dead ends: 89 [2023-02-15 18:18:29,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1210, Invalid=8690, Unknown=0, NotChecked=0, Total=9900 [2023-02-15 18:18:29,922 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 144 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:29,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 280 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 18:18:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-15 18:18:29,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2023-02-15 18:18:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 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 18:18:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-02-15 18:18:29,934 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 33 [2023-02-15 18:18:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:29,935 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-02-15 18:18:29,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 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 18:18:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-02-15 18:18:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 18:18:29,936 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:29,936 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:29,957 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 18:18:30,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 18:18:30,141 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:30,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1382940040, now seen corresponding path program 13 times [2023-02-15 18:18:30,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:30,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74436934] [2023-02-15 18:18:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:30,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:30,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:30,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74436934] [2023-02-15 18:18:30,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74436934] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:30,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059639670] [2023-02-15 18:18:30,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:18:30,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:30,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:30,537 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 18:18:30,540 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 18:18:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:30,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-15 18:18:30,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:30,759 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 13 treesize of output 9 [2023-02-15 18:18:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:31,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:31,134 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 14 [2023-02-15 18:18:31,143 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 24 treesize of output 20 [2023-02-15 18:18:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:31,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059639670] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:31,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:31,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2023-02-15 18:18:31,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032070001] [2023-02-15 18:18:31,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:31,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-15 18:18:31,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-15 18:18:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 18:18:31,173 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 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 18:18:31,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:31,630 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2023-02-15 18:18:31,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 18:18:31,630 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 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 37 [2023-02-15 18:18:31,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:31,631 INFO L225 Difference]: With dead ends: 92 [2023-02-15 18:18:31,631 INFO L226 Difference]: Without dead ends: 90 [2023-02-15 18:18:31,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=2345, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 18:18:31,632 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:31,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 356 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 18:18:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-15 18:18:31,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2023-02-15 18:18:31,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 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 18:18:31,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-02-15 18:18:31,644 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 37 [2023-02-15 18:18:31,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:31,644 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-02-15 18:18:31,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 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 18:18:31,644 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-02-15 18:18:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 18:18:31,645 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:31,645 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:31,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-15 18:18:31,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:31,845 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:31,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:31,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1845221877, now seen corresponding path program 14 times [2023-02-15 18:18:31,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:31,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318240153] [2023-02-15 18:18:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:31,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:32,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:32,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318240153] [2023-02-15 18:18:32,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318240153] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:32,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301555466] [2023-02-15 18:18:32,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:18:32,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:32,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:32,077 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 18:18:32,129 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 18:18:32,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:18:32,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:32,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 18:18:32,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:32,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:32,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301555466] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:32,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:32,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-02-15 18:18:32,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256877493] [2023-02-15 18:18:32,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:32,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 18:18:32,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:32,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 18:18:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-02-15 18:18:32,497 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 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 18:18:32,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:32,715 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2023-02-15 18:18:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 18:18:32,716 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 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 40 [2023-02-15 18:18:32,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:32,716 INFO L225 Difference]: With dead ends: 121 [2023-02-15 18:18:32,716 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 18:18:32,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 51 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 18:18:32,717 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:32,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 97 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:18:32,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 18:18:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2023-02-15 18:18:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 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 18:18:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2023-02-15 18:18:32,726 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2023-02-15 18:18:32,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:32,726 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2023-02-15 18:18:32,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 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 18:18:32,726 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2023-02-15 18:18:32,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 18:18:32,728 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:32,728 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:32,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 18:18:32,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 18:18:32,933 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:32,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:32,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1575431467, now seen corresponding path program 15 times [2023-02-15 18:18:32,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:32,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630832540] [2023-02-15 18:18:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:32,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:33,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:33,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630832540] [2023-02-15 18:18:33,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630832540] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:33,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86117193] [2023-02-15 18:18:33,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:18:33,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:33,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:33,453 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:18:33,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 18:18:33,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-15 18:18:33,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:33,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 18:18:33,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:33,874 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 13 treesize of output 9 [2023-02-15 18:18:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:34,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:34,423 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 14 [2023-02-15 18:18:34,424 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 24 treesize of output 20 [2023-02-15 18:18:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:34,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86117193] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:34,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:34,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2023-02-15 18:18:34,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807450661] [2023-02-15 18:18:34,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:34,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-15 18:18:34,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:34,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-15 18:18:34,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2410, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 18:18:34,459 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 51 states have internal predecessors, (105), 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 18:18:35,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:35,306 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2023-02-15 18:18:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 18:18:35,306 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 51 states have internal predecessors, (105), 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 41 [2023-02-15 18:18:35,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:35,306 INFO L225 Difference]: With dead ends: 49 [2023-02-15 18:18:35,306 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 18:18:35,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=301, Invalid=4529, Unknown=0, NotChecked=0, Total=4830 [2023-02-15 18:18:35,310 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:35,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 350 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 18:18:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 18:18:35,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-02-15 18:18:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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 18:18:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-02-15 18:18:35,329 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2023-02-15 18:18:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:35,330 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-02-15 18:18:35,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 51 states have internal predecessors, (105), 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 18:18:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-02-15 18:18:35,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 18:18:35,331 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:35,331 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:35,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 18:18:35,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 18:18:35,537 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:35,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1718983822, now seen corresponding path program 16 times [2023-02-15 18:18:35,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:35,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025737593] [2023-02-15 18:18:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:35,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:35,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025737593] [2023-02-15 18:18:35,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025737593] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:35,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278744752] [2023-02-15 18:18:35,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:18:35,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:35,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:35,796 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:18:35,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 18:18:35,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:18:35,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:35,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 18:18:35,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:36,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:36,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278744752] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:36,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:36,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-02-15 18:18:36,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235616487] [2023-02-15 18:18:36,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:36,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 18:18:36,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 18:18:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 18:18:36,270 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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 18:18:36,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:36,450 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2023-02-15 18:18:36,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 18:18:36,450 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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 44 [2023-02-15 18:18:36,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:36,450 INFO L225 Difference]: With dead ends: 86 [2023-02-15 18:18:36,450 INFO L226 Difference]: Without dead ends: 52 [2023-02-15 18:18:36,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 56 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 18:18:36,453 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:36,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 101 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:18:36,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-15 18:18:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2023-02-15 18:18:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 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 18:18:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2023-02-15 18:18:36,461 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2023-02-15 18:18:36,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:36,461 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2023-02-15 18:18:36,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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 18:18:36,461 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2023-02-15 18:18:36,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 18:18:36,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:36,462 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:36,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-15 18:18:36,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:36,669 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:36,669 INFO L85 PathProgramCache]: Analyzing trace with hash 814558120, now seen corresponding path program 17 times [2023-02-15 18:18:36,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:36,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119377616] [2023-02-15 18:18:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:36,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:37,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119377616] [2023-02-15 18:18:37,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119377616] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:37,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092614891] [2023-02-15 18:18:37,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:18:37,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:37,147 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:18:37,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 18:18:37,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-15 18:18:37,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:37,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-15 18:18:37,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:37,414 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 13 treesize of output 9 [2023-02-15 18:18:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:37,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:37,988 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 14 [2023-02-15 18:18:37,989 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 24 treesize of output 20 [2023-02-15 18:18:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:38,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092614891] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:38,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:38,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 49 [2023-02-15 18:18:38,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780762649] [2023-02-15 18:18:38,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:38,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 18:18:38,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:38,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 18:18:38,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2203, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 18:18:38,023 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 49 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 49 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 18:18:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:38,582 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2023-02-15 18:18:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 18:18:38,582 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 49 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 45 [2023-02-15 18:18:38,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:38,583 INFO L225 Difference]: With dead ends: 53 [2023-02-15 18:18:38,583 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 18:18:38,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=276, Invalid=3756, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 18:18:38,584 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:38,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 316 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 18:18:38,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 18:18:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2023-02-15 18:18:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 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 18:18:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-02-15 18:18:38,591 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2023-02-15 18:18:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:38,592 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-02-15 18:18:38,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 49 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 18:18:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-02-15 18:18:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 18:18:38,592 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:38,592 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:38,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-15 18:18:38,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:38,793 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:38,793 INFO L85 PathProgramCache]: Analyzing trace with hash -59476011, now seen corresponding path program 18 times [2023-02-15 18:18:38,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:38,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272536862] [2023-02-15 18:18:38,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:38,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:39,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:39,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272536862] [2023-02-15 18:18:39,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272536862] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:39,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801479842] [2023-02-15 18:18:39,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:18:39,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:39,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:39,097 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:18:39,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 18:18:39,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-02-15 18:18:39,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:39,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 18:18:39,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:39,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:39,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801479842] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:39,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:39,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-02-15 18:18:39,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111273362] [2023-02-15 18:18:39,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:39,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 18:18:39,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:39,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 18:18:39,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 18:18:39,732 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 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 18:18:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:39,866 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2023-02-15 18:18:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 18:18:39,867 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 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 48 [2023-02-15 18:18:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:39,867 INFO L225 Difference]: With dead ends: 93 [2023-02-15 18:18:39,867 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 18:18:39,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 22 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 18:18:39,871 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:39,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 116 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:18:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 18:18:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2023-02-15 18:18:39,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 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 18:18:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-02-15 18:18:39,880 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2023-02-15 18:18:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:39,880 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-02-15 18:18:39,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 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 18:18:39,880 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-02-15 18:18:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 18:18:39,881 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:39,881 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:39,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-15 18:18:40,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:40,083 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:40,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:40,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1204565259, now seen corresponding path program 19 times [2023-02-15 18:18:40,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:40,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127125160] [2023-02-15 18:18:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:40,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:40,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:40,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127125160] [2023-02-15 18:18:40,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127125160] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:40,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962426091] [2023-02-15 18:18:40,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:18:40,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:40,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:40,626 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:18:40,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 18:18:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:40,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-15 18:18:40,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:41,001 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 13 treesize of output 9 [2023-02-15 18:18:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:41,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:41,572 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 14 [2023-02-15 18:18:41,575 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 24 treesize of output 20 [2023-02-15 18:18:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:41,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962426091] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:41,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:41,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-02-15 18:18:41,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170242893] [2023-02-15 18:18:41,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:41,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-15 18:18:41,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:41,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-15 18:18:41,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 18:18:41,613 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 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 18:18:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:42,278 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2023-02-15 18:18:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 18:18:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 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 49 [2023-02-15 18:18:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:42,279 INFO L225 Difference]: With dead ends: 57 [2023-02-15 18:18:42,279 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 18:18:42,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=260, Invalid=3900, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 18:18:42,292 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:42,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 497 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 18:18:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 18:18:42,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-02-15 18:18:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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 18:18:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-02-15 18:18:42,301 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2023-02-15 18:18:42,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:42,301 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-02-15 18:18:42,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 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 18:18:42,301 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-02-15 18:18:42,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 18:18:42,302 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:42,302 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:42,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 18:18:42,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-15 18:18:42,507 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:42,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:42,507 INFO L85 PathProgramCache]: Analyzing trace with hash 756666258, now seen corresponding path program 20 times [2023-02-15 18:18:42,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:42,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667296345] [2023-02-15 18:18:42,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:42,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:42,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:42,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667296345] [2023-02-15 18:18:42,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667296345] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:42,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068187245] [2023-02-15 18:18:42,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:18:42,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:42,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:42,800 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:18:42,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 18:18:42,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:18:42,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:42,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 18:18:42,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:43,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:43,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068187245] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:43,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:43,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-02-15 18:18:43,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576249934] [2023-02-15 18:18:43,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:43,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 18:18:43,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 18:18:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 18:18:43,268 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 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 18:18:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:43,411 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2023-02-15 18:18:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 18:18:43,411 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 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 52 [2023-02-15 18:18:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:43,411 INFO L225 Difference]: With dead ends: 100 [2023-02-15 18:18:43,412 INFO L226 Difference]: Without dead ends: 60 [2023-02-15 18:18:43,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 66 SyntacticMatches, 24 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 18:18:43,416 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 135 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:43,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 91 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:18:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-15 18:18:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2023-02-15 18:18:43,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 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 18:18:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2023-02-15 18:18:43,425 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2023-02-15 18:18:43,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:43,426 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2023-02-15 18:18:43,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 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 18:18:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2023-02-15 18:18:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 18:18:43,426 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:43,426 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:43,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 18:18:43,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-15 18:18:43,631 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:43,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1598292424, now seen corresponding path program 21 times [2023-02-15 18:18:43,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:43,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527582553] [2023-02-15 18:18:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:43,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:44,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:44,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527582553] [2023-02-15 18:18:44,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527582553] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:44,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819592671] [2023-02-15 18:18:44,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:18:44,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:44,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:44,204 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:18:44,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 18:18:44,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-15 18:18:44,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:44,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-15 18:18:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:44,881 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 15 treesize of output 11 [2023-02-15 18:18:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:45,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:45,313 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 14 [2023-02-15 18:18:45,314 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 24 treesize of output 20 [2023-02-15 18:18:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:45,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819592671] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:45,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:45,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 41 [2023-02-15 18:18:45,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352119891] [2023-02-15 18:18:45,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:45,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 18:18:45,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:45,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 18:18:45,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 18:18:45,341 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 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 18:18:45,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:45,750 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2023-02-15 18:18:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 18:18:45,750 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 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 53 [2023-02-15 18:18:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:45,752 INFO L225 Difference]: With dead ends: 61 [2023-02-15 18:18:45,752 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 18:18:45,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=2872, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 18:18:45,762 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:45,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 391 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:18:45,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 18:18:45,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2023-02-15 18:18:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 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 18:18:45,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-02-15 18:18:45,791 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2023-02-15 18:18:45,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:45,791 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-02-15 18:18:45,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 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 18:18:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-02-15 18:18:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 18:18:45,792 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:45,792 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:45,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 18:18:45,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:45,993 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:45,993 INFO L85 PathProgramCache]: Analyzing trace with hash 726953397, now seen corresponding path program 22 times [2023-02-15 18:18:45,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:45,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905933605] [2023-02-15 18:18:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:45,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:46,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:46,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905933605] [2023-02-15 18:18:46,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905933605] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:46,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573768201] [2023-02-15 18:18:46,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:18:46,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:46,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:46,320 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:18:46,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 18:18:46,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:18:46,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:46,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 18:18:46,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:46,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:47,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573768201] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:47,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:47,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-02-15 18:18:47,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173148687] [2023-02-15 18:18:47,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:47,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 18:18:47,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:47,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 18:18:47,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 18:18:47,052 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 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 18:18:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:47,262 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2023-02-15 18:18:47,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 18:18:47,262 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 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 56 [2023-02-15 18:18:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:47,263 INFO L225 Difference]: With dead ends: 107 [2023-02-15 18:18:47,263 INFO L226 Difference]: Without dead ends: 64 [2023-02-15 18:18:47,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 71 SyntacticMatches, 26 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 18:18:47,264 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:47,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 110 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:18:47,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-15 18:18:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2023-02-15 18:18:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 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 18:18:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2023-02-15 18:18:47,275 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2023-02-15 18:18:47,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:47,275 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2023-02-15 18:18:47,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 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 18:18:47,275 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2023-02-15 18:18:47,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 18:18:47,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:47,276 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:47,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 18:18:47,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:47,483 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:47,483 INFO L85 PathProgramCache]: Analyzing trace with hash -66153237, now seen corresponding path program 23 times [2023-02-15 18:18:47,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:47,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450990010] [2023-02-15 18:18:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:47,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:48,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:48,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450990010] [2023-02-15 18:18:48,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450990010] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:48,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414497841] [2023-02-15 18:18:48,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:18:48,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:48,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:48,369 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:18:48,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 18:18:48,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-15 18:18:48,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:48,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-15 18:18:48,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:48,592 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 22 treesize of output 18 [2023-02-15 18:18:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:48,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:49,259 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 14 [2023-02-15 18:18:49,260 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 24 treesize of output 20 [2023-02-15 18:18:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:49,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414497841] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:49,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:49,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 60 [2023-02-15 18:18:49,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951082135] [2023-02-15 18:18:49,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:49,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-15 18:18:49,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:49,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-15 18:18:49,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3362, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 18:18:49,465 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 60 states, 60 states have (on average 1.9) internal successors, (114), 60 states have internal predecessors, (114), 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 18:18:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:50,535 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2023-02-15 18:18:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 18:18:50,535 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9) internal successors, (114), 60 states have internal predecessors, (114), 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 57 [2023-02-15 18:18:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:50,536 INFO L225 Difference]: With dead ends: 65 [2023-02-15 18:18:50,536 INFO L226 Difference]: Without dead ends: 63 [2023-02-15 18:18:50,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 71 SyntacticMatches, 13 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=339, Invalid=5823, Unknown=0, NotChecked=0, Total=6162 [2023-02-15 18:18:50,536 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:50,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 584 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1846 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 18:18:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-15 18:18:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-02-15 18:18:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 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 18:18:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-02-15 18:18:50,546 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2023-02-15 18:18:50,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:50,547 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-02-15 18:18:50,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9) internal successors, (114), 60 states have internal predecessors, (114), 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 18:18:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-02-15 18:18:50,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 18:18:50,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:50,547 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:50,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-15 18:18:50,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-15 18:18:50,752 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:50,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:50,753 INFO L85 PathProgramCache]: Analyzing trace with hash 623698866, now seen corresponding path program 24 times [2023-02-15 18:18:50,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:50,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431855485] [2023-02-15 18:18:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:50,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:51,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:51,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431855485] [2023-02-15 18:18:51,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431855485] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:51,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179299136] [2023-02-15 18:18:51,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:18:51,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:51,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:51,117 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:18:51,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 18:18:51,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-02-15 18:18:51,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:51,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 18:18:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:51,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:52,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179299136] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:52,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:52,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-02-15 18:18:52,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132096193] [2023-02-15 18:18:52,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:52,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-15 18:18:52,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:52,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-15 18:18:52,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 18:18:52,052 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 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 18:18:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:52,281 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2023-02-15 18:18:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 18:18:52,281 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 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 60 [2023-02-15 18:18:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:52,282 INFO L225 Difference]: With dead ends: 114 [2023-02-15 18:18:52,282 INFO L226 Difference]: Without dead ends: 68 [2023-02-15 18:18:52,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 76 SyntacticMatches, 28 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 18:18:52,284 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 141 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:52,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 110 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:18:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-15 18:18:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2023-02-15 18:18:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 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 18:18:52,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2023-02-15 18:18:52,295 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2023-02-15 18:18:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:52,295 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2023-02-15 18:18:52,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 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 18:18:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2023-02-15 18:18:52,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-15 18:18:52,296 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:52,296 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:52,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-15 18:18:52,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-15 18:18:52,502 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:52,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:52,503 INFO L85 PathProgramCache]: Analyzing trace with hash 829718504, now seen corresponding path program 25 times [2023-02-15 18:18:52,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:52,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074092849] [2023-02-15 18:18:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:52,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:53,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:53,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074092849] [2023-02-15 18:18:53,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074092849] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:53,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053104832] [2023-02-15 18:18:53,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:18:53,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:53,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:53,172 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:18:53,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-15 18:18:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:53,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-15 18:18:53,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:53,688 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 13 treesize of output 9 [2023-02-15 18:18:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:54,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:54,458 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 14 [2023-02-15 18:18:54,462 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 24 treesize of output 20 [2023-02-15 18:18:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:54,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053104832] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:54,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:54,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2023-02-15 18:18:54,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273698657] [2023-02-15 18:18:54,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:54,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-15 18:18:54,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-15 18:18:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 18:18:54,510 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 63 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 63 states have internal predecessors, (123), 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 18:18:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:55,174 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2023-02-15 18:18:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 18:18:55,174 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 63 states have internal predecessors, (123), 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 61 [2023-02-15 18:18:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:55,174 INFO L225 Difference]: With dead ends: 69 [2023-02-15 18:18:55,175 INFO L226 Difference]: Without dead ends: 67 [2023-02-15 18:18:55,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=320, Invalid=6000, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 18:18:55,176 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:55,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 670 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 18:18:55,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-15 18:18:55,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-02-15 18:18:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 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 18:18:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-02-15 18:18:55,186 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2023-02-15 18:18:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:55,187 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-02-15 18:18:55,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 63 states have internal predecessors, (123), 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 18:18:55,187 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-02-15 18:18:55,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 18:18:55,187 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:55,187 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:55,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-02-15 18:18:55,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-15 18:18:55,390 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:55,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:55,391 INFO L85 PathProgramCache]: Analyzing trace with hash 611957653, now seen corresponding path program 26 times [2023-02-15 18:18:55,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:55,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344505210] [2023-02-15 18:18:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:55,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:55,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:55,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344505210] [2023-02-15 18:18:55,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344505210] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:55,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643516984] [2023-02-15 18:18:55,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:18:55,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:55,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:55,816 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:18:55,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-15 18:18:55,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:18:55,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:55,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 18:18:55,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:56,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:56,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643516984] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:56,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:56,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-02-15 18:18:56,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648680452] [2023-02-15 18:18:56,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:56,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 18:18:56,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:56,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 18:18:56,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 18:18:56,552 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 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 18:18:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:18:56,739 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2023-02-15 18:18:56,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 18:18:56,740 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 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 64 [2023-02-15 18:18:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:18:56,740 INFO L225 Difference]: With dead ends: 121 [2023-02-15 18:18:56,740 INFO L226 Difference]: Without dead ends: 72 [2023-02-15 18:18:56,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 81 SyntacticMatches, 30 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 18:18:56,745 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 187 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:18:56,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 128 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:18:56,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-15 18:18:56,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2023-02-15 18:18:56,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 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 18:18:56,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2023-02-15 18:18:56,757 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2023-02-15 18:18:56,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:18:56,758 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2023-02-15 18:18:56,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 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 18:18:56,758 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2023-02-15 18:18:56,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 18:18:56,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:18:56,758 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:18:56,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-15 18:18:56,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-15 18:18:56,964 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:18:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:18:56,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1317817547, now seen corresponding path program 27 times [2023-02-15 18:18:56,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:18:56,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669123610] [2023-02-15 18:18:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:18:56,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:18:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:18:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:57,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:18:57,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669123610] [2023-02-15 18:18:57,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669123610] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:18:57,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559042823] [2023-02-15 18:18:57,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:18:57,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:18:57,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:18:57,667 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:18:57,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-15 18:18:58,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-15 18:18:58,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:18:58,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 107 conjunts are in the unsatisfiable core [2023-02-15 18:18:58,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:18:58,583 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 15 treesize of output 11 [2023-02-15 18:18:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:59,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:18:59,377 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 14 [2023-02-15 18:18:59,379 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 24 treesize of output 20 [2023-02-15 18:18:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:18:59,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559042823] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:18:59,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:18:59,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 66 [2023-02-15 18:18:59,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150318457] [2023-02-15 18:18:59,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:18:59,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-15 18:18:59,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:18:59,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-15 18:18:59,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=4110, Unknown=0, NotChecked=0, Total=4290 [2023-02-15 18:18:59,424 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 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 18:19:00,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:19:00,220 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2023-02-15 18:19:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 18:19:00,220 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 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 65 [2023-02-15 18:19:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:19:00,221 INFO L225 Difference]: With dead ends: 73 [2023-02-15 18:19:00,221 INFO L226 Difference]: Without dead ends: 71 [2023-02-15 18:19:00,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=318, Invalid=6822, Unknown=0, NotChecked=0, Total=7140 [2023-02-15 18:19:00,222 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 2194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 18:19:00,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 664 Invalid, 2194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 18:19:00,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-15 18:19:00,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2023-02-15 18:19:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 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 18:19:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2023-02-15 18:19:00,234 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2023-02-15 18:19:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:19:00,234 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2023-02-15 18:19:00,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 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 18:19:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2023-02-15 18:19:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 18:19:00,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:19:00,235 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:19:00,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-02-15 18:19:00,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:00,440 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:19:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:19:00,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1188716590, now seen corresponding path program 28 times [2023-02-15 18:19:00,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:19:00,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109613941] [2023-02-15 18:19:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:19:00,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:19:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:00,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:19:00,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109613941] [2023-02-15 18:19:00,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109613941] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:19:00,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469362672] [2023-02-15 18:19:00,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:19:00,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:00,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:19:00,879 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:19:00,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-15 18:19:01,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:19:01,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:19:01,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 18:19:01,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:19:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:01,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:19:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:01,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469362672] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:19:01,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:19:01,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-02-15 18:19:01,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793348407] [2023-02-15 18:19:01,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:19:01,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 18:19:01,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:19:01,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 18:19:01,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 18:19:01,925 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 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 18:19:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:19:02,120 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2023-02-15 18:19:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 18:19:02,120 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 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 68 [2023-02-15 18:19:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:19:02,121 INFO L225 Difference]: With dead ends: 128 [2023-02-15 18:19:02,121 INFO L226 Difference]: Without dead ends: 76 [2023-02-15 18:19:02,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 86 SyntacticMatches, 32 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2023-02-15 18:19:02,122 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 127 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:19:02,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 167 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:19:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-15 18:19:02,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2023-02-15 18:19:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 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 18:19:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2023-02-15 18:19:02,134 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2023-02-15 18:19:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:19:02,134 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2023-02-15 18:19:02,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 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 18:19:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2023-02-15 18:19:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 18:19:02,135 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:19:02,135 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:19:02,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-15 18:19:02,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:02,341 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:19:02,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:19:02,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2004834808, now seen corresponding path program 29 times [2023-02-15 18:19:02,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:19:02,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919378536] [2023-02-15 18:19:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:19:02,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:19:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:03,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:19:03,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919378536] [2023-02-15 18:19:03,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919378536] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:19:03,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122500645] [2023-02-15 18:19:03,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:19:03,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:03,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:19:03,177 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:19:03,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-15 18:19:03,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-02-15 18:19:03,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:19:03,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-15 18:19:03,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:19:03,868 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 13 treesize of output 9 [2023-02-15 18:19:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:04,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:19:04,805 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 14 [2023-02-15 18:19:04,806 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 24 treesize of output 20 [2023-02-15 18:19:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:04,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122500645] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:19:04,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:19:04,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 73 [2023-02-15 18:19:04,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674756977] [2023-02-15 18:19:04,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:19:04,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-02-15 18:19:04,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:19:04,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-02-15 18:19:04,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5037, Unknown=0, NotChecked=0, Total=5256 [2023-02-15 18:19:04,841 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 73 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 73 states have internal predecessors, (141), 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 18:19:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:19:05,790 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2023-02-15 18:19:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-15 18:19:05,790 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 73 states have internal predecessors, (141), 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 69 [2023-02-15 18:19:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:19:05,790 INFO L225 Difference]: With dead ends: 77 [2023-02-15 18:19:05,791 INFO L226 Difference]: Without dead ends: 75 [2023-02-15 18:19:05,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=405, Invalid=8525, Unknown=0, NotChecked=0, Total=8930 [2023-02-15 18:19:05,792 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 2700 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 18:19:05,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 872 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 18:19:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-15 18:19:05,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2023-02-15 18:19:05,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 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 18:19:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2023-02-15 18:19:05,804 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2023-02-15 18:19:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:19:05,804 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2023-02-15 18:19:05,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 73 states have internal predecessors, (141), 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 18:19:05,805 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2023-02-15 18:19:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-15 18:19:05,805 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:19:05,805 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:19:05,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-15 18:19:06,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-15 18:19:06,010 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:19:06,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:19:06,011 INFO L85 PathProgramCache]: Analyzing trace with hash -213753483, now seen corresponding path program 30 times [2023-02-15 18:19:06,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:19:06,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454685156] [2023-02-15 18:19:06,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:19:06,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:19:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:06,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:19:06,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454685156] [2023-02-15 18:19:06,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454685156] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:19:06,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490232274] [2023-02-15 18:19:06,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:19:06,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:06,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:19:06,399 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:19:06,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-15 18:19:07,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-02-15 18:19:07,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:19:07,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 18:19:07,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:19:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:07,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:19:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:07,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490232274] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:19:07,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:19:07,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-02-15 18:19:07,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321586904] [2023-02-15 18:19:07,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:19:07,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-15 18:19:07,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:19:07,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-15 18:19:07,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 18:19:07,879 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 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 18:19:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:19:08,086 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2023-02-15 18:19:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 18:19:08,086 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 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 72 [2023-02-15 18:19:08,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:19:08,087 INFO L225 Difference]: With dead ends: 135 [2023-02-15 18:19:08,087 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 18:19:08,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 91 SyntacticMatches, 34 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2023-02-15 18:19:08,088 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 173 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:19:08,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 164 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:19:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 18:19:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2023-02-15 18:19:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 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 18:19:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2023-02-15 18:19:08,101 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2023-02-15 18:19:08,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:19:08,102 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2023-02-15 18:19:08,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 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 18:19:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2023-02-15 18:19:08,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 18:19:08,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:19:08,102 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:19:08,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-15 18:19:08,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:08,308 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:19:08,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:19:08,309 INFO L85 PathProgramCache]: Analyzing trace with hash -190620501, now seen corresponding path program 31 times [2023-02-15 18:19:08,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:19:08,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305752203] [2023-02-15 18:19:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:19:08,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:19:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:09,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:19:09,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305752203] [2023-02-15 18:19:09,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305752203] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:19:09,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615121241] [2023-02-15 18:19:09,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:19:09,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:09,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:19:09,498 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:19:09,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-15 18:19:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:09,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-15 18:19:09,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:19:09,659 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 13 treesize of output 9 [2023-02-15 18:19:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:10,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:19:11,219 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 14 [2023-02-15 18:19:11,221 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 24 treesize of output 20 [2023-02-15 18:19:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:11,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615121241] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:19:11,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:19:11,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 90 [2023-02-15 18:19:11,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617099422] [2023-02-15 18:19:11,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:19:11,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-02-15 18:19:11,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:19:11,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-02-15 18:19:11,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=7731, Unknown=0, NotChecked=0, Total=8010 [2023-02-15 18:19:11,922 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 90 states, 90 states have (on average 2.111111111111111) internal successors, (190), 90 states have internal predecessors, (190), 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 18:19:13,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:19:13,661 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2023-02-15 18:19:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-15 18:19:13,661 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.111111111111111) internal successors, (190), 90 states have internal predecessors, (190), 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 73 [2023-02-15 18:19:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:19:13,662 INFO L225 Difference]: With dead ends: 81 [2023-02-15 18:19:13,662 INFO L226 Difference]: Without dead ends: 79 [2023-02-15 18:19:13,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=455, Invalid=11535, Unknown=0, NotChecked=0, Total=11990 [2023-02-15 18:19:13,663 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 3261 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 3280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:19:13,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1071 Invalid, 3280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3261 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 18:19:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-15 18:19:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-02-15 18:19:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 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 18:19:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2023-02-15 18:19:13,677 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2023-02-15 18:19:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:19:13,679 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2023-02-15 18:19:13,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.111111111111111) internal successors, (190), 90 states have internal predecessors, (190), 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 18:19:13,679 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2023-02-15 18:19:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-15 18:19:13,687 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:19:13,687 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:19:13,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-15 18:19:13,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:13,893 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:19:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:19:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash -823786510, now seen corresponding path program 32 times [2023-02-15 18:19:13,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:19:13,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933829328] [2023-02-15 18:19:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:19:13,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:19:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:14,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:19:14,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933829328] [2023-02-15 18:19:14,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933829328] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:19:14,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896658552] [2023-02-15 18:19:14,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:19:14,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:14,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:19:14,449 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:19:14,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-15 18:19:14,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:19:14,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:19:14,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 18:19:14,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:19:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:15,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:19:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:15,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896658552] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:19:15,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:19:15,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2023-02-15 18:19:15,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263969509] [2023-02-15 18:19:15,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:19:15,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-15 18:19:15,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:19:15,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-15 18:19:15,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 18:19:15,398 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 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 18:19:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:19:15,691 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2023-02-15 18:19:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 18:19:15,691 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 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 76 [2023-02-15 18:19:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:19:15,691 INFO L225 Difference]: With dead ends: 142 [2023-02-15 18:19:15,692 INFO L226 Difference]: Without dead ends: 84 [2023-02-15 18:19:15,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 96 SyntacticMatches, 36 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2730 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1370, Invalid=4482, Unknown=0, NotChecked=0, Total=5852 [2023-02-15 18:19:15,692 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 181 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:19:15,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 137 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:19:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-15 18:19:15,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2023-02-15 18:19:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 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 18:19:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2023-02-15 18:19:15,706 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2023-02-15 18:19:15,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:19:15,706 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2023-02-15 18:19:15,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 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 18:19:15,706 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2023-02-15 18:19:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-15 18:19:15,706 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:19:15,707 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:19:15,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-02-15 18:19:15,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-15 18:19:15,911 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:19:15,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:19:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash -196447192, now seen corresponding path program 33 times [2023-02-15 18:19:15,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:19:15,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249849784] [2023-02-15 18:19:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:19:15,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:19:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:16,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:19:16,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249849784] [2023-02-15 18:19:16,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249849784] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:19:16,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944708861] [2023-02-15 18:19:16,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:19:16,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:16,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:19:16,837 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:19:16,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-15 18:19:18,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-02-15 18:19:18,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:19:18,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 130 conjunts are in the unsatisfiable core [2023-02-15 18:19:18,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:19:19,092 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 13 treesize of output 9 [2023-02-15 18:19:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:20,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:19:21,485 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 14 [2023-02-15 18:19:21,486 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 24 treesize of output 20 [2023-02-15 18:19:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:22,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944708861] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:19:22,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:19:22,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 42, 42] total 119 [2023-02-15 18:19:22,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714748120] [2023-02-15 18:19:22,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:19:22,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-02-15 18:19:22,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:19:22,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-02-15 18:19:22,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=13070, Unknown=0, NotChecked=0, Total=14042 [2023-02-15 18:19:22,479 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 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 18:19:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:19:30,814 INFO L93 Difference]: Finished difference Result 201 states and 222 transitions. [2023-02-15 18:19:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-15 18:19:30,815 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 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 77 [2023-02-15 18:19:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:19:30,815 INFO L225 Difference]: With dead ends: 201 [2023-02-15 18:19:30,815 INFO L226 Difference]: Without dead ends: 199 [2023-02-15 18:19:30,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12328 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=3856, Invalid=44764, Unknown=0, NotChecked=0, Total=48620 [2023-02-15 18:19:30,817 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 391 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 4256 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 4470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 4256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 18:19:30,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1397 Invalid, 4470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 4256 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 18:19:30,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-02-15 18:19:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2023-02-15 18:19:30,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 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 18:19:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2023-02-15 18:19:30,851 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 77 [2023-02-15 18:19:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:19:30,851 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2023-02-15 18:19:30,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 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 18:19:30,852 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2023-02-15 18:19:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-15 18:19:30,852 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:19:30,852 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:19:30,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-15 18:19:31,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-15 18:19:31,059 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:19:31,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:19:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1697760395, now seen corresponding path program 34 times [2023-02-15 18:19:31,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:19:31,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841373354] [2023-02-15 18:19:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:19:31,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:19:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:32,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:19:32,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841373354] [2023-02-15 18:19:32,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841373354] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:19:32,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035207404] [2023-02-15 18:19:32,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:19:32,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:32,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:19:32,101 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:19:32,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-15 18:19:32,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:19:32,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:19:32,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-15 18:19:32,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:19:33,114 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 13 treesize of output 9 [2023-02-15 18:19:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:34,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:19:34,483 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 14 [2023-02-15 18:19:34,485 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 24 treesize of output 20 [2023-02-15 18:19:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:34,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035207404] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:19:34,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:19:34,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 85 [2023-02-15 18:19:34,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969103736] [2023-02-15 18:19:34,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:19:34,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-02-15 18:19:34,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:19:34,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-02-15 18:19:34,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=6883, Unknown=0, NotChecked=0, Total=7140 [2023-02-15 18:19:34,540 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 85 states, 85 states have (on average 1.9176470588235295) internal successors, (163), 85 states have internal predecessors, (163), 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 18:19:36,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:19:36,063 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2023-02-15 18:19:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-15 18:19:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.9176470588235295) internal successors, (163), 85 states have internal predecessors, (163), 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 81 [2023-02-15 18:19:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:19:36,064 INFO L225 Difference]: With dead ends: 202 [2023-02-15 18:19:36,064 INFO L226 Difference]: Without dead ends: 200 [2023-02-15 18:19:36,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=466, Invalid=11744, Unknown=0, NotChecked=0, Total=12210 [2023-02-15 18:19:36,065 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 3877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:19:36,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1400 Invalid, 3877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 18:19:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-15 18:19:36,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 137. [2023-02-15 18:19:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 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 18:19:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2023-02-15 18:19:36,101 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 81 [2023-02-15 18:19:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:19:36,101 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2023-02-15 18:19:36,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.9176470588235295) internal successors, (163), 85 states have internal predecessors, (163), 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 18:19:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2023-02-15 18:19:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-15 18:19:36,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:19:36,102 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:19:36,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-15 18:19:36,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-15 18:19:36,308 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:19:36,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:19:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash 449843218, now seen corresponding path program 35 times [2023-02-15 18:19:36,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:19:36,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735572056] [2023-02-15 18:19:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:19:36,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:19:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:36,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:19:36,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735572056] [2023-02-15 18:19:36,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735572056] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:19:36,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325174003] [2023-02-15 18:19:36,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:19:36,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:36,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:19:36,918 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:19:36,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-15 18:19:37,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-02-15 18:19:37,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:19:37,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 18:19:37,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:19:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:37,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:19:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:38,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325174003] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:19:38,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:19:38,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2023-02-15 18:19:38,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605570603] [2023-02-15 18:19:38,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:19:38,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-15 18:19:38,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:19:38,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-15 18:19:38,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 18:19:38,098 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 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 18:19:38,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:19:38,563 INFO L93 Difference]: Finished difference Result 264 states and 267 transitions. [2023-02-15 18:19:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-15 18:19:38,564 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 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 84 [2023-02-15 18:19:38,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:19:38,564 INFO L225 Difference]: With dead ends: 264 [2023-02-15 18:19:38,564 INFO L226 Difference]: Without dead ends: 92 [2023-02-15 18:19:38,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 106 SyntacticMatches, 40 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4304 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2374, Invalid=8546, Unknown=0, NotChecked=0, Total=10920 [2023-02-15 18:19:38,565 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 380 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:19:38,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 192 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:19:38,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-15 18:19:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2023-02-15 18:19:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 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 18:19:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2023-02-15 18:19:38,592 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2023-02-15 18:19:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:19:38,592 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2023-02-15 18:19:38,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 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 18:19:38,593 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2023-02-15 18:19:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-15 18:19:38,593 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:19:38,593 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:19:38,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-15 18:19:38,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:38,799 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:19:38,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:19:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash -751572408, now seen corresponding path program 36 times [2023-02-15 18:19:38,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:19:38,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703898618] [2023-02-15 18:19:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:19:38,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:19:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:39,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:19:39,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703898618] [2023-02-15 18:19:39,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703898618] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:19:39,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472217962] [2023-02-15 18:19:39,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:19:39,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:39,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:19:39,772 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:19:39,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-15 18:19:41,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-02-15 18:19:41,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:19:41,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 111 conjunts are in the unsatisfiable core [2023-02-15 18:19:41,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:19:41,360 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 18:19:42,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:19:42,556 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 72 treesize of output 30 [2023-02-15 18:19:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:42,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:19:43,966 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 51 treesize of output 45 [2023-02-15 18:19:43,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:19:43,969 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 76 treesize of output 64 [2023-02-15 18:19:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:44,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472217962] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:19:44,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:19:44,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 49, 49] total 87 [2023-02-15 18:19:44,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111107690] [2023-02-15 18:19:44,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:19:44,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-02-15 18:19:44,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:19:44,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-02-15 18:19:44,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=7160, Unknown=0, NotChecked=0, Total=7482 [2023-02-15 18:19:44,046 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 87 states, 87 states have (on average 2.103448275862069) internal successors, (183), 87 states have internal predecessors, (183), 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 18:19:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:19:46,218 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2023-02-15 18:19:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-02-15 18:19:46,218 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.103448275862069) internal successors, (183), 87 states have internal predecessors, (183), 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 85 [2023-02-15 18:19:46,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:19:46,219 INFO L225 Difference]: With dead ends: 93 [2023-02-15 18:19:46,219 INFO L226 Difference]: Without dead ends: 91 [2023-02-15 18:19:46,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 117 SyntacticMatches, 10 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2407 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=610, Invalid=12962, Unknown=0, NotChecked=0, Total=13572 [2023-02-15 18:19:46,220 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 3770 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 3794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:19:46,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1029 Invalid, 3794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3770 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 18:19:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-15 18:19:46,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2023-02-15 18:19:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 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 18:19:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2023-02-15 18:19:46,264 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2023-02-15 18:19:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:19:46,264 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2023-02-15 18:19:46,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.103448275862069) internal successors, (183), 87 states have internal predecessors, (183), 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 18:19:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2023-02-15 18:19:46,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-02-15 18:19:46,264 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:19:46,264 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:19:46,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-15 18:19:46,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-15 18:19:46,471 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:19:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:19:46,471 INFO L85 PathProgramCache]: Analyzing trace with hash -424299211, now seen corresponding path program 37 times [2023-02-15 18:19:46,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:19:46,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259418876] [2023-02-15 18:19:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:19:46,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:19:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:47,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:19:47,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259418876] [2023-02-15 18:19:47,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259418876] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:19:47,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056658637] [2023-02-15 18:19:47,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:19:47,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:47,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:19:47,236 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:19:47,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-15 18:19:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:47,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 18:19:47,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:19:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:47,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:19:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:48,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056658637] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:19:48,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:19:48,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2023-02-15 18:19:48,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425734679] [2023-02-15 18:19:48,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:19:48,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-15 18:19:48,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:19:48,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-15 18:19:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2023-02-15 18:19:48,558 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 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 18:19:48,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:19:48,848 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2023-02-15 18:19:48,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 18:19:48,848 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 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 88 [2023-02-15 18:19:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:19:48,848 INFO L225 Difference]: With dead ends: 163 [2023-02-15 18:19:48,849 INFO L226 Difference]: Without dead ends: 96 [2023-02-15 18:19:48,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 111 SyntacticMatches, 42 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3660 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1817, Invalid=6015, Unknown=0, NotChecked=0, Total=7832 [2023-02-15 18:19:48,849 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 211 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:19:48,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 195 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:19:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-15 18:19:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2023-02-15 18:19:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 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 18:19:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2023-02-15 18:19:48,877 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2023-02-15 18:19:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:19:48,878 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2023-02-15 18:19:48,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 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 18:19:48,878 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2023-02-15 18:19:48,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-15 18:19:48,878 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:19:48,878 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:19:48,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-02-15 18:19:49,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-15 18:19:49,083 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:19:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:19:49,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1198160789, now seen corresponding path program 38 times [2023-02-15 18:19:49,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:19:49,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103901585] [2023-02-15 18:19:49,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:19:49,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:19:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:50,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:19:50,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103901585] [2023-02-15 18:19:50,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103901585] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:19:50,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463871999] [2023-02-15 18:19:50,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:19:50,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:50,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:19:50,380 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:19:50,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-15 18:19:50,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:19:50,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:19:50,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-15 18:19:50,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:19:50,574 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 15 treesize of output 11 [2023-02-15 18:19:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:51,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:19:52,113 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 14 [2023-02-15 18:19:52,115 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 24 treesize of output 20 [2023-02-15 18:19:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:52,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463871999] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:19:52,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:19:52,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 110 [2023-02-15 18:19:52,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238484308] [2023-02-15 18:19:52,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:19:52,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-02-15 18:19:52,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:19:52,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-02-15 18:19:52,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=11647, Unknown=0, NotChecked=0, Total=11990 [2023-02-15 18:19:52,793 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 110 states, 110 states have (on average 2.1272727272727274) internal successors, (234), 110 states have internal predecessors, (234), 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 18:19:54,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:19:54,446 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2023-02-15 18:19:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-15 18:19:54,446 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.1272727272727274) internal successors, (234), 110 states have internal predecessors, (234), 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 89 [2023-02-15 18:19:54,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:19:54,447 INFO L225 Difference]: With dead ends: 97 [2023-02-15 18:19:54,447 INFO L226 Difference]: Without dead ends: 95 [2023-02-15 18:19:54,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2857 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=555, Invalid=17267, Unknown=0, NotChecked=0, Total=17822 [2023-02-15 18:19:54,449 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 4936 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 4958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:19:54,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1615 Invalid, 4958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4936 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 18:19:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-15 18:19:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-02-15 18:19:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 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 18:19:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2023-02-15 18:19:54,487 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 89 [2023-02-15 18:19:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:19:54,488 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2023-02-15 18:19:54,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.1272727272727274) internal successors, (234), 110 states have internal predecessors, (234), 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 18:19:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2023-02-15 18:19:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-15 18:19:54,488 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:19:54,488 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:19:54,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-02-15 18:19:54,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:54,694 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:19:54,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:19:54,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1069925426, now seen corresponding path program 39 times [2023-02-15 18:19:54,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:19:54,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245639048] [2023-02-15 18:19:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:19:54,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:19:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:19:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:55,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:19:55,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245639048] [2023-02-15 18:19:55,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245639048] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:19:55,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493176053] [2023-02-15 18:19:55,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:19:55,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:19:55,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:19:55,235 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:19:55,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-15 18:19:57,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2023-02-15 18:19:57,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:19:57,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 18:19:57,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:19:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:57,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:19:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:19:58,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493176053] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:19:58,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:19:58,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2023-02-15 18:19:58,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724702709] [2023-02-15 18:19:58,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:19:58,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-15 18:19:58,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:19:58,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-15 18:19:58,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3815, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 18:19:58,318 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 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 18:19:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:19:58,607 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2023-02-15 18:19:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-15 18:19:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 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 92 [2023-02-15 18:19:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:19:58,608 INFO L225 Difference]: With dead ends: 170 [2023-02-15 18:19:58,608 INFO L226 Difference]: Without dead ends: 100 [2023-02-15 18:19:58,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 116 SyntacticMatches, 44 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1980, Invalid=6576, Unknown=0, NotChecked=0, Total=8556 [2023-02-15 18:19:58,609 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 229 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:19:58,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 206 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:19:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-15 18:19:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2023-02-15 18:19:58,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 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 18:19:58,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2023-02-15 18:19:58,637 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2023-02-15 18:19:58,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:19:58,637 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2023-02-15 18:19:58,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 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 18:19:58,637 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2023-02-15 18:19:58,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-15 18:19:58,639 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:19:58,639 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:19:58,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-02-15 18:19:58,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-02-15 18:19:58,847 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:19:58,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:19:58,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1914636392, now seen corresponding path program 40 times [2023-02-15 18:19:58,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:19:58,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906432780] [2023-02-15 18:19:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:19:58,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:19:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:20:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:00,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:20:00,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906432780] [2023-02-15 18:20:00,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906432780] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:20:00,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735285414] [2023-02-15 18:20:00,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:20:00,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:00,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:20:00,135 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:20:00,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-15 18:20:00,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:20:00,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:20:00,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 107 conjunts are in the unsatisfiable core [2023-02-15 18:20:00,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:20:01,422 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 18:20:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:02,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:20:03,041 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 14 [2023-02-15 18:20:03,042 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 24 treesize of output 20 [2023-02-15 18:20:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:03,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735285414] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:20:03,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:20:03,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 97 [2023-02-15 18:20:03,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793515089] [2023-02-15 18:20:03,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:20:03,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-02-15 18:20:03,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:20:03,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-02-15 18:20:03,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=9021, Unknown=0, NotChecked=0, Total=9312 [2023-02-15 18:20:03,105 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 97 states, 97 states have (on average 1.9484536082474226) internal successors, (189), 97 states have internal predecessors, (189), 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 18:20:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:20:04,727 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2023-02-15 18:20:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-02-15 18:20:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9484536082474226) internal successors, (189), 97 states have internal predecessors, (189), 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 93 [2023-02-15 18:20:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:20:04,727 INFO L225 Difference]: With dead ends: 101 [2023-02-15 18:20:04,728 INFO L226 Difference]: Without dead ends: 99 [2023-02-15 18:20:04,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2843 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=525, Invalid=14975, Unknown=0, NotChecked=0, Total=15500 [2023-02-15 18:20:04,728 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 5115 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 5139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 5115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:20:04,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1631 Invalid, 5139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 5115 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 18:20:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-15 18:20:04,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2023-02-15 18:20:04,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 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 18:20:04,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-02-15 18:20:04,758 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 93 [2023-02-15 18:20:04,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:20:04,759 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-02-15 18:20:04,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9484536082474226) internal successors, (189), 97 states have internal predecessors, (189), 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 18:20:04,759 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-02-15 18:20:04,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-15 18:20:04,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:20:04,759 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:20:04,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-15 18:20:04,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:04,966 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:20:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:20:04,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1771856661, now seen corresponding path program 41 times [2023-02-15 18:20:04,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:20:04,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6740199] [2023-02-15 18:20:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:20:04,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:20:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:20:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:05,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:20:05,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6740199] [2023-02-15 18:20:05,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6740199] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:20:05,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459365953] [2023-02-15 18:20:05,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:20:05,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:05,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:20:05,763 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:20:05,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-15 18:20:06,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2023-02-15 18:20:06,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:20:06,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 18:20:06,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:20:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:07,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:20:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:08,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459365953] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:20:08,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:20:08,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2023-02-15 18:20:08,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531635449] [2023-02-15 18:20:08,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:20:08,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-15 18:20:08,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:20:08,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-15 18:20:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1253, Invalid=4149, Unknown=0, NotChecked=0, Total=5402 [2023-02-15 18:20:08,185 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 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 18:20:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:20:08,510 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2023-02-15 18:20:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 18:20:08,510 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 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 96 [2023-02-15 18:20:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:20:08,511 INFO L225 Difference]: With dead ends: 177 [2023-02-15 18:20:08,511 INFO L226 Difference]: Without dead ends: 104 [2023-02-15 18:20:08,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 121 SyntacticMatches, 46 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4355 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2150, Invalid=7162, Unknown=0, NotChecked=0, Total=9312 [2023-02-15 18:20:08,512 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 183 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:20:08,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 238 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:20:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-15 18:20:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2023-02-15 18:20:08,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 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 18:20:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2023-02-15 18:20:08,542 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2023-02-15 18:20:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:20:08,542 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2023-02-15 18:20:08,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 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 18:20:08,543 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2023-02-15 18:20:08,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-02-15 18:20:08,543 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:20:08,543 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:20:08,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-02-15 18:20:08,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:08,751 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:20:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:20:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2001953717, now seen corresponding path program 42 times [2023-02-15 18:20:08,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:20:08,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171475063] [2023-02-15 18:20:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:20:08,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:20:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:20:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:10,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:20:10,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171475063] [2023-02-15 18:20:10,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171475063] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:20:10,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453038352] [2023-02-15 18:20:10,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:20:10,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:10,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:20:10,189 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:20:10,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-15 18:20:11,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2023-02-15 18:20:11,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:20:11,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 111 conjunts are in the unsatisfiable core [2023-02-15 18:20:11,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:20:11,701 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 15 treesize of output 11 [2023-02-15 18:20:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:12,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:20:12,679 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 14 [2023-02-15 18:20:12,680 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 24 treesize of output 20 [2023-02-15 18:20:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:12,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453038352] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:20:12,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:20:12,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 76 [2023-02-15 18:20:12,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945967273] [2023-02-15 18:20:12,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:20:12,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-15 18:20:12,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:20:12,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-15 18:20:12,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=5498, Unknown=0, NotChecked=0, Total=5700 [2023-02-15 18:20:12,742 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 76 states, 76 states have (on average 2.223684210526316) internal successors, (169), 76 states have internal predecessors, (169), 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 18:20:14,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:20:14,867 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2023-02-15 18:20:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-15 18:20:14,867 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.223684210526316) internal successors, (169), 76 states have internal predecessors, (169), 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 97 [2023-02-15 18:20:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:20:14,867 INFO L225 Difference]: With dead ends: 105 [2023-02-15 18:20:14,867 INFO L226 Difference]: Without dead ends: 103 [2023-02-15 18:20:14,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 164 SyntacticMatches, 4 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=414, Invalid=10506, Unknown=0, NotChecked=0, Total=10920 [2023-02-15 18:20:14,868 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 4557 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 4582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 4557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 18:20:14,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1392 Invalid, 4582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 4557 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 18:20:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-15 18:20:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2023-02-15 18:20:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 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 18:20:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2023-02-15 18:20:14,914 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 97 [2023-02-15 18:20:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:20:14,914 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2023-02-15 18:20:14,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.223684210526316) internal successors, (169), 76 states have internal predecessors, (169), 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 18:20:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2023-02-15 18:20:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-15 18:20:14,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:20:14,915 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:20:14,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-02-15 18:20:15,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-15 18:20:15,122 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:20:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:20:15,123 INFO L85 PathProgramCache]: Analyzing trace with hash -282517422, now seen corresponding path program 43 times [2023-02-15 18:20:15,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:20:15,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636345752] [2023-02-15 18:20:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:20:15,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:20:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:20:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 738 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:15,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:20:15,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636345752] [2023-02-15 18:20:15,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636345752] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:20:15,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302371018] [2023-02-15 18:20:15,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:20:15,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:15,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:20:15,995 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:20:15,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-15 18:20:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:20:16,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 18:20:16,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:20:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:17,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:20:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:17,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302371018] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:20:17,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:20:17,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2023-02-15 18:20:17,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105553183] [2023-02-15 18:20:17,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:20:17,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-02-15 18:20:17,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:20:17,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-02-15 18:20:17,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=4497, Unknown=0, NotChecked=0, Total=5852 [2023-02-15 18:20:17,679 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 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 18:20:18,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:20:18,116 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2023-02-15 18:20:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-15 18:20:18,118 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 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 100 [2023-02-15 18:20:18,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:20:18,120 INFO L225 Difference]: With dead ends: 184 [2023-02-15 18:20:18,121 INFO L226 Difference]: Without dead ends: 108 [2023-02-15 18:20:18,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 126 SyntacticMatches, 48 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4725 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2327, Invalid=7773, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 18:20:18,122 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 247 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:20:18,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 209 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:20:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-15 18:20:18,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2023-02-15 18:20:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 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 18:20:18,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2023-02-15 18:20:18,164 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2023-02-15 18:20:18,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:20:18,165 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2023-02-15 18:20:18,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 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 18:20:18,165 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2023-02-15 18:20:18,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-15 18:20:18,165 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:20:18,166 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:20:18,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-02-15 18:20:18,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-15 18:20:18,371 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:20:18,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:20:18,371 INFO L85 PathProgramCache]: Analyzing trace with hash 745393800, now seen corresponding path program 44 times [2023-02-15 18:20:18,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:20:18,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85610300] [2023-02-15 18:20:18,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:20:18,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:20:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:20:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:19,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:20:19,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85610300] [2023-02-15 18:20:19,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85610300] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:20:19,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108816724] [2023-02-15 18:20:19,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:20:19,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:19,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:20:19,987 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:20:19,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-15 18:20:20,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:20:20,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:20:20,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 158 conjunts are in the unsatisfiable core [2023-02-15 18:20:20,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:20:21,245 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 13 treesize of output 9 [2023-02-15 18:20:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:22,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:20:23,082 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 14 [2023-02-15 18:20:23,084 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 24 treesize of output 20 [2023-02-15 18:20:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:23,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108816724] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:20:23,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:20:23,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 103 [2023-02-15 18:20:23,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85017368] [2023-02-15 18:20:23,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:20:23,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-02-15 18:20:23,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:20:23,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-02-15 18:20:23,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=10202, Unknown=0, NotChecked=0, Total=10506 [2023-02-15 18:20:23,155 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 103 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 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 18:20:25,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:20:25,588 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2023-02-15 18:20:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-15 18:20:25,588 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 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 101 [2023-02-15 18:20:25,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:20:25,589 INFO L225 Difference]: With dead ends: 109 [2023-02-15 18:20:25,589 INFO L226 Difference]: Without dead ends: 107 [2023-02-15 18:20:25,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2949 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=520, Invalid=16250, Unknown=0, NotChecked=0, Total=16770 [2023-02-15 18:20:25,590 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 1941 mSDsCounter, 0 mSdLazyCounter, 5944 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1971 SdHoareTripleChecker+Invalid, 5970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 5944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-15 18:20:25,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1971 Invalid, 5970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 5944 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-15 18:20:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-15 18:20:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2023-02-15 18:20:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 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 18:20:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-02-15 18:20:25,624 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2023-02-15 18:20:25,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:20:25,624 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-02-15 18:20:25,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 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 18:20:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-02-15 18:20:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-15 18:20:25,625 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:20:25,625 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:20:25,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-02-15 18:20:25,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-15 18:20:25,831 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:20:25,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:20:25,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1050568949, now seen corresponding path program 45 times [2023-02-15 18:20:25,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:20:25,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980005033] [2023-02-15 18:20:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:20:25,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:20:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:20:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:26,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:20:26,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980005033] [2023-02-15 18:20:26,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980005033] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:20:26,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249862567] [2023-02-15 18:20:26,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:20:26,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:26,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:20:26,656 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:20:26,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-15 18:20:30,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2023-02-15 18:20:30,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:20:30,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 18:20:30,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:20:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:30,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:20:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:31,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249862567] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:20:31,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:20:31,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2023-02-15 18:20:31,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909472807] [2023-02-15 18:20:31,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:20:31,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-02-15 18:20:31,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:20:31,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-02-15 18:20:31,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1461, Invalid=4859, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 18:20:31,433 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 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 18:20:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:20:31,888 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2023-02-15 18:20:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-15 18:20:31,889 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 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 104 [2023-02-15 18:20:31,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:20:31,889 INFO L225 Difference]: With dead ends: 191 [2023-02-15 18:20:31,889 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 18:20:31,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 131 SyntacticMatches, 50 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5110 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2511, Invalid=8409, Unknown=0, NotChecked=0, Total=10920 [2023-02-15 18:20:31,891 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 321 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:20:31,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 245 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:20:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 18:20:31,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2023-02-15 18:20:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 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 18:20:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2023-02-15 18:20:31,924 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2023-02-15 18:20:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:20:31,925 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2023-02-15 18:20:31,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 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 18:20:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2023-02-15 18:20:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-02-15 18:20:31,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:20:31,926 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:20:31,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-02-15 18:20:32,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:32,134 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:20:32,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:20:32,134 INFO L85 PathProgramCache]: Analyzing trace with hash -791344085, now seen corresponding path program 46 times [2023-02-15 18:20:32,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:20:32,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252647839] [2023-02-15 18:20:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:20:32,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:20:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:20:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:34,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:20:34,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252647839] [2023-02-15 18:20:34,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252647839] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:20:34,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777210587] [2023-02-15 18:20:34,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:20:34,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:34,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:20:34,041 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:20:34,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-15 18:20:34,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:20:34,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:20:34,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 117 conjunts are in the unsatisfiable core [2023-02-15 18:20:34,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:20:35,614 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 13 treesize of output 9 [2023-02-15 18:20:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:36,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:20:38,241 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 14 [2023-02-15 18:20:38,244 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 24 treesize of output 20 [2023-02-15 18:20:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:38,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777210587] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:20:38,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:20:38,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 133 [2023-02-15 18:20:38,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923821168] [2023-02-15 18:20:38,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:20:38,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-02-15 18:20:38,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:20:38,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-02-15 18:20:38,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=17181, Unknown=0, NotChecked=0, Total=17556 [2023-02-15 18:20:38,263 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 133 states, 133 states have (on average 2.112781954887218) internal successors, (281), 133 states have internal predecessors, (281), 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 18:20:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:20:42,387 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2023-02-15 18:20:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-15 18:20:42,387 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.112781954887218) internal successors, (281), 133 states have internal predecessors, (281), 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 105 [2023-02-15 18:20:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:20:42,388 INFO L225 Difference]: With dead ends: 113 [2023-02-15 18:20:42,388 INFO L226 Difference]: Without dead ends: 111 [2023-02-15 18:20:42,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4440 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=846, Invalid=33936, Unknown=0, NotChecked=0, Total=34782 [2023-02-15 18:20:42,390 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 122 mSDsluCounter, 2396 mSDsCounter, 0 mSdLazyCounter, 7782 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 7811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 7782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-15 18:20:42,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 2426 Invalid, 7811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 7782 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-15 18:20:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-15 18:20:42,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2023-02-15 18:20:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 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 18:20:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2023-02-15 18:20:42,431 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 105 [2023-02-15 18:20:42,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:20:42,431 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2023-02-15 18:20:42,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.112781954887218) internal successors, (281), 133 states have internal predecessors, (281), 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 18:20:42,432 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2023-02-15 18:20:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-15 18:20:42,432 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:20:42,432 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:20:42,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-02-15 18:20:42,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-15 18:20:42,640 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:20:42,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:20:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash 148644978, now seen corresponding path program 47 times [2023-02-15 18:20:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:20:42,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807110106] [2023-02-15 18:20:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:20:42,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:20:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:20:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:43,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:20:43,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807110106] [2023-02-15 18:20:43,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807110106] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:20:43,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961685446] [2023-02-15 18:20:43,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:20:43,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:43,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:20:43,372 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:20:43,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-15 18:20:44,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2023-02-15 18:20:44,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:20:44,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-15 18:20:44,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:20:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:45,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:20:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:45,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961685446] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:20:45,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:20:45,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 83 [2023-02-15 18:20:45,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612749462] [2023-02-15 18:20:45,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:20:45,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-02-15 18:20:45,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:20:45,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-02-15 18:20:45,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1571, Invalid=5235, Unknown=0, NotChecked=0, Total=6806 [2023-02-15 18:20:45,642 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 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 18:20:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:20:46,019 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2023-02-15 18:20:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-15 18:20:46,019 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 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 108 [2023-02-15 18:20:46,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:20:46,033 INFO L225 Difference]: With dead ends: 198 [2023-02-15 18:20:46,033 INFO L226 Difference]: Without dead ends: 116 [2023-02-15 18:20:46,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 136 SyntacticMatches, 52 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5510 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2702, Invalid=9070, Unknown=0, NotChecked=0, Total=11772 [2023-02-15 18:20:46,041 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 269 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:20:46,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 240 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:20:46,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-15 18:20:46,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2023-02-15 18:20:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 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 18:20:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2023-02-15 18:20:46,092 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2023-02-15 18:20:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:20:46,092 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2023-02-15 18:20:46,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 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 18:20:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2023-02-15 18:20:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-15 18:20:46,093 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:20:46,093 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:20:46,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-02-15 18:20:46,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-15 18:20:46,300 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:20:46,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:20:46,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1946010456, now seen corresponding path program 48 times [2023-02-15 18:20:46,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:20:46,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939685325] [2023-02-15 18:20:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:20:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:20:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:20:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:47,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:20:47,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939685325] [2023-02-15 18:20:47,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939685325] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:20:47,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521664705] [2023-02-15 18:20:47,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:20:47,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:47,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:20:47,595 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:20:47,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-02-15 18:20:49,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2023-02-15 18:20:49,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:20:49,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 121 conjunts are in the unsatisfiable core [2023-02-15 18:20:49,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:20:49,966 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 15 treesize of output 11 [2023-02-15 18:20:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:50,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:20:51,099 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 14 [2023-02-15 18:20:51,100 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 24 treesize of output 20 [2023-02-15 18:20:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:51,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521664705] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:20:51,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:20:51,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 57, 57] total 85 [2023-02-15 18:20:51,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244706483] [2023-02-15 18:20:51,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:20:51,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-02-15 18:20:51,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:20:51,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-02-15 18:20:51,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=6914, Unknown=0, NotChecked=0, Total=7140 [2023-02-15 18:20:51,159 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 85 states, 85 states have (on average 2.235294117647059) internal successors, (190), 85 states have internal predecessors, (190), 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 18:20:53,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:20:53,018 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2023-02-15 18:20:53,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-15 18:20:53,018 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.235294117647059) internal successors, (190), 85 states have internal predecessors, (190), 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 109 [2023-02-15 18:20:53,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:20:53,034 INFO L225 Difference]: With dead ends: 117 [2023-02-15 18:20:53,034 INFO L226 Difference]: Without dead ends: 115 [2023-02-15 18:20:53,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 184 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=459, Invalid=13113, Unknown=0, NotChecked=0, Total=13572 [2023-02-15 18:20:53,035 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 46 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 5865 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1844 SdHoareTripleChecker+Invalid, 5894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 5865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:20:53,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1844 Invalid, 5894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 5865 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 18:20:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-15 18:20:53,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2023-02-15 18:20:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 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 18:20:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2023-02-15 18:20:53,079 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2023-02-15 18:20:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:20:53,079 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2023-02-15 18:20:53,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.235294117647059) internal successors, (190), 85 states have internal predecessors, (190), 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 18:20:53,080 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2023-02-15 18:20:53,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-15 18:20:53,080 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:20:53,080 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:20:53,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-02-15 18:20:53,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:53,288 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:20:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:20:53,288 INFO L85 PathProgramCache]: Analyzing trace with hash -124139819, now seen corresponding path program 49 times [2023-02-15 18:20:53,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:20:53,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331403584] [2023-02-15 18:20:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:20:53,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:20:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:20:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:54,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:20:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331403584] [2023-02-15 18:20:54,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331403584] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:20:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034667134] [2023-02-15 18:20:54,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:20:54,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:54,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:20:54,126 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:20:54,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-02-15 18:20:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:20:54,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-15 18:20:54,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:20:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:55,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:20:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:55,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034667134] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:20:55,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:20:55,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 86 [2023-02-15 18:20:55,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320370879] [2023-02-15 18:20:55,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:20:55,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-02-15 18:20:55,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:20:55,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-02-15 18:20:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1685, Invalid=5625, Unknown=0, NotChecked=0, Total=7310 [2023-02-15 18:20:55,678 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 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 18:20:56,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:20:56,100 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2023-02-15 18:20:56,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-15 18:20:56,100 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 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 112 [2023-02-15 18:20:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:20:56,101 INFO L225 Difference]: With dead ends: 205 [2023-02-15 18:20:56,101 INFO L226 Difference]: Without dead ends: 120 [2023-02-15 18:20:56,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 141 SyntacticMatches, 54 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5925 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2900, Invalid=9756, Unknown=0, NotChecked=0, Total=12656 [2023-02-15 18:20:56,102 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 313 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:20:56,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 293 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:20:56,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-15 18:20:56,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2023-02-15 18:20:56,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 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 18:20:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2023-02-15 18:20:56,153 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2023-02-15 18:20:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:20:56,153 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2023-02-15 18:20:56,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 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 18:20:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2023-02-15 18:20:56,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-15 18:20:56,154 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:20:56,154 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:20:56,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-02-15 18:20:56,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-02-15 18:20:56,360 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:20:56,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:20:56,360 INFO L85 PathProgramCache]: Analyzing trace with hash -840117237, now seen corresponding path program 50 times [2023-02-15 18:20:56,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:20:56,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852369047] [2023-02-15 18:20:56,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:20:56,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:20:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:20:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:20:57,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:20:57,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852369047] [2023-02-15 18:20:57,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852369047] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:20:57,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103180161] [2023-02-15 18:20:57,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:20:57,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:20:57,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:20:57,861 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:20:57,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-02-15 18:20:58,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:20:58,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:20:58,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 176 conjunts are in the unsatisfiable core [2023-02-15 18:20:58,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:20:59,161 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 13 treesize of output 9 [2023-02-15 18:21:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:00,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:21:00,833 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 14 [2023-02-15 18:21:00,834 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 24 treesize of output 20 [2023-02-15 18:21:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:00,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103180161] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:21:00,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:21:00,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 115 [2023-02-15 18:21:00,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225362815] [2023-02-15 18:21:00,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:21:00,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2023-02-15 18:21:00,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:00,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2023-02-15 18:21:00,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=12770, Unknown=0, NotChecked=0, Total=13110 [2023-02-15 18:21:00,886 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 115 states, 115 states have (on average 1.9739130434782608) internal successors, (227), 115 states have internal predecessors, (227), 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 18:21:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:02,901 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2023-02-15 18:21:02,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-15 18:21:02,901 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.9739130434782608) internal successors, (227), 115 states have internal predecessors, (227), 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 113 [2023-02-15 18:21:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:02,902 INFO L225 Difference]: With dead ends: 121 [2023-02-15 18:21:02,902 INFO L226 Difference]: Without dead ends: 119 [2023-02-15 18:21:02,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3684 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=580, Invalid=20300, Unknown=0, NotChecked=0, Total=20880 [2023-02-15 18:21:02,904 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 2355 mSDsCounter, 0 mSdLazyCounter, 7095 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 7123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 7095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 18:21:02,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2388 Invalid, 7123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 7095 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 18:21:02,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-15 18:21:02,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2023-02-15 18:21:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 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 18:21:02,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2023-02-15 18:21:02,940 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2023-02-15 18:21:02,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:02,940 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2023-02-15 18:21:02,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.9739130434782608) internal successors, (227), 115 states have internal predecessors, (227), 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 18:21:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2023-02-15 18:21:02,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-15 18:21:02,941 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:02,941 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:02,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-02-15 18:21:03,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:03,147 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:03,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:03,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1153380206, now seen corresponding path program 51 times [2023-02-15 18:21:03,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:03,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729864568] [2023-02-15 18:21:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:03,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:03,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:03,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729864568] [2023-02-15 18:21:03,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729864568] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:21:03,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600325404] [2023-02-15 18:21:03,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:21:03,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:03,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:21:03,994 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:21:03,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-02-15 18:21:24,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2023-02-15 18:21:24,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:21:24,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 18:21:24,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:21:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:25,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:21:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:25,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600325404] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:21:25,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:21:25,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 89 [2023-02-15 18:21:25,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749772270] [2023-02-15 18:21:25,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:21:25,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-02-15 18:21:25,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:25,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-02-15 18:21:25,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1803, Invalid=6029, Unknown=0, NotChecked=0, Total=7832 [2023-02-15 18:21:25,559 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 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 18:21:25,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:25,952 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2023-02-15 18:21:25,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-15 18:21:25,952 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 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 116 [2023-02-15 18:21:25,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:25,953 INFO L225 Difference]: With dead ends: 212 [2023-02-15 18:21:25,953 INFO L226 Difference]: Without dead ends: 124 [2023-02-15 18:21:25,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 146 SyntacticMatches, 56 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6355 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3105, Invalid=10467, Unknown=0, NotChecked=0, Total=13572 [2023-02-15 18:21:25,955 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 219 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:21:25,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 315 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:21:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-15 18:21:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2023-02-15 18:21:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 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 18:21:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2023-02-15 18:21:26,010 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2023-02-15 18:21:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:26,011 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2023-02-15 18:21:26,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 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 18:21:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2023-02-15 18:21:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-02-15 18:21:26,011 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:26,012 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:26,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-02-15 18:21:26,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-02-15 18:21:26,222 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:26,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:26,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1765692104, now seen corresponding path program 52 times [2023-02-15 18:21:26,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:26,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952156058] [2023-02-15 18:21:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:26,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:27,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:27,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952156058] [2023-02-15 18:21:27,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952156058] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:21:27,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390190123] [2023-02-15 18:21:27,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:21:27,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:27,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:21:27,830 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:21:27,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-02-15 18:21:34,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:21:34,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:21:34,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 129 conjunts are in the unsatisfiable core [2023-02-15 18:21:34,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:21:34,823 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 18:21:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:36,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:21:36,487 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 14 [2023-02-15 18:21:36,488 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 24 treesize of output 20 [2023-02-15 18:21:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:36,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390190123] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:21:36,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:21:36,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 61, 61] total 91 [2023-02-15 18:21:36,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085353946] [2023-02-15 18:21:36,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:21:36,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-02-15 18:21:36,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-02-15 18:21:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=7948, Unknown=0, NotChecked=0, Total=8190 [2023-02-15 18:21:36,553 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 91 states, 91 states have (on average 2.241758241758242) internal successors, (204), 91 states have internal predecessors, (204), 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 18:21:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:38,562 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2023-02-15 18:21:38,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-02-15 18:21:38,562 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.241758241758242) internal successors, (204), 91 states have internal predecessors, (204), 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 117 [2023-02-15 18:21:38,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:38,563 INFO L225 Difference]: With dead ends: 125 [2023-02-15 18:21:38,563 INFO L226 Difference]: Without dead ends: 123 [2023-02-15 18:21:38,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 199 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=489, Invalid=15011, Unknown=0, NotChecked=0, Total=15500 [2023-02-15 18:21:38,565 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 46 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 6495 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 6526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 6495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-15 18:21:38,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 2016 Invalid, 6526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 6495 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-15 18:21:38,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-15 18:21:38,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2023-02-15 18:21:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 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 18:21:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2023-02-15 18:21:38,614 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 117 [2023-02-15 18:21:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:38,614 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2023-02-15 18:21:38,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.241758241758242) internal successors, (204), 91 states have internal predecessors, (204), 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 18:21:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2023-02-15 18:21:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-15 18:21:38,615 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:38,615 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:38,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-02-15 18:21:38,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-02-15 18:21:38,826 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:38,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:38,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1273789621, now seen corresponding path program 53 times [2023-02-15 18:21:38,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:38,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288904842] [2023-02-15 18:21:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:38,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:39,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:39,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288904842] [2023-02-15 18:21:39,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288904842] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:21:39,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964858614] [2023-02-15 18:21:39,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:21:39,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:39,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:21:39,858 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:21:39,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-02-15 18:21:40,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2023-02-15 18:21:40,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:21:40,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-15 18:21:40,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:21:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:41,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:21:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:42,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964858614] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:21:42,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:21:42,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 92 [2023-02-15 18:21:42,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880469404] [2023-02-15 18:21:42,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:21:42,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-02-15 18:21:42,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:42,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-02-15 18:21:42,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1925, Invalid=6447, Unknown=0, NotChecked=0, Total=8372 [2023-02-15 18:21:42,238 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 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 18:21:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:21:42,668 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2023-02-15 18:21:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-15 18:21:42,669 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 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 120 [2023-02-15 18:21:42,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:21:42,669 INFO L225 Difference]: With dead ends: 219 [2023-02-15 18:21:42,669 INFO L226 Difference]: Without dead ends: 128 [2023-02-15 18:21:42,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 151 SyntacticMatches, 58 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6800 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3317, Invalid=11203, Unknown=0, NotChecked=0, Total=14520 [2023-02-15 18:21:42,671 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 311 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:21:42,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 291 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:21:42,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-15 18:21:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2023-02-15 18:21:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 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 18:21:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2023-02-15 18:21:42,718 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 120 [2023-02-15 18:21:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:21:42,718 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2023-02-15 18:21:42,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 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 18:21:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2023-02-15 18:21:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-15 18:21:42,719 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:21:42,719 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:21:42,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-02-15 18:21:42,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:42,929 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:21:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:21:42,929 INFO L85 PathProgramCache]: Analyzing trace with hash -565054485, now seen corresponding path program 54 times [2023-02-15 18:21:42,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:21:42,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123598151] [2023-02-15 18:21:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:21:42,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:21:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:21:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:45,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:21:45,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123598151] [2023-02-15 18:21:45,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123598151] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:21:45,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153770884] [2023-02-15 18:21:45,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:21:45,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:21:45,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:21:45,100 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:21:45,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-02-15 18:21:53,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2023-02-15 18:21:53,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:21:53,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 128 conjunts are in the unsatisfiable core [2023-02-15 18:21:53,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:21:54,096 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 13 treesize of output 9 [2023-02-15 18:21:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:55,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:21:57,571 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 14 [2023-02-15 18:21:57,572 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 24 treesize of output 20 [2023-02-15 18:21:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:21:57,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153770884] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:21:57,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:21:57,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 151 [2023-02-15 18:21:57,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634177141] [2023-02-15 18:21:57,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:21:57,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2023-02-15 18:21:57,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:21:57,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2023-02-15 18:21:57,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=22230, Unknown=0, NotChecked=0, Total=22650 [2023-02-15 18:21:57,604 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 151 states, 151 states have (on average 2.152317880794702) internal successors, (325), 151 states have internal predecessors, (325), 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 18:22:02,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:02,749 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2023-02-15 18:22:02,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-02-15 18:22:02,750 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.152317880794702) internal successors, (325), 151 states have internal predecessors, (325), 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 121 [2023-02-15 18:22:02,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:02,750 INFO L225 Difference]: With dead ends: 129 [2023-02-15 18:22:02,750 INFO L226 Difference]: Without dead ends: 127 [2023-02-15 18:22:02,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5424 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=921, Invalid=42969, Unknown=0, NotChecked=0, Total=43890 [2023-02-15 18:22:02,752 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 128 mSDsluCounter, 3259 mSDsCounter, 0 mSdLazyCounter, 10035 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 10065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 10035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:02,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 3294 Invalid, 10065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 10035 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-15 18:22:02,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-15 18:22:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2023-02-15 18:22:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 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 18:22:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2023-02-15 18:22:02,798 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 121 [2023-02-15 18:22:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:02,799 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2023-02-15 18:22:02,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.152317880794702) internal successors, (325), 151 states have internal predecessors, (325), 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 18:22:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2023-02-15 18:22:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-15 18:22:02,800 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:02,800 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:02,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:03,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:03,005 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:03,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:03,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1556536142, now seen corresponding path program 55 times [2023-02-15 18:22:03,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:03,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113335912] [2023-02-15 18:22:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:03,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:04,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:04,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113335912] [2023-02-15 18:22:04,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113335912] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:04,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589168608] [2023-02-15 18:22:04,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:22:04,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:04,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:04,210 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:04,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-02-15 18:22:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:04,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-15 18:22:04,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:05,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:06,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589168608] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:06,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:06,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 95 [2023-02-15 18:22:06,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711215980] [2023-02-15 18:22:06,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:06,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-02-15 18:22:06,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:06,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-02-15 18:22:06,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2051, Invalid=6879, Unknown=0, NotChecked=0, Total=8930 [2023-02-15 18:22:06,303 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 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 18:22:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:06,899 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2023-02-15 18:22:06,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-15 18:22:06,899 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 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 124 [2023-02-15 18:22:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:06,900 INFO L225 Difference]: With dead ends: 226 [2023-02-15 18:22:06,900 INFO L226 Difference]: Without dead ends: 132 [2023-02-15 18:22:06,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 156 SyntacticMatches, 60 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7260 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3536, Invalid=11964, Unknown=0, NotChecked=0, Total=15500 [2023-02-15 18:22:06,902 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 311 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:06,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 284 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:22:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-15 18:22:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2023-02-15 18:22:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 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 18:22:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2023-02-15 18:22:06,942 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 124 [2023-02-15 18:22:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:06,942 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2023-02-15 18:22:06,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 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 18:22:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2023-02-15 18:22:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-15 18:22:06,943 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:06,943 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:06,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:07,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:07,149 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:07,150 INFO L85 PathProgramCache]: Analyzing trace with hash 184815848, now seen corresponding path program 56 times [2023-02-15 18:22:07,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:07,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356643384] [2023-02-15 18:22:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:07,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:09,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:09,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356643384] [2023-02-15 18:22:09,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356643384] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:09,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926425923] [2023-02-15 18:22:09,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:22:09,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:09,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:09,290 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:09,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-02-15 18:22:09,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:22:09,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:09,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 194 conjunts are in the unsatisfiable core [2023-02-15 18:22:09,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:11,098 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 13 treesize of output 9 [2023-02-15 18:22:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:12,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:12,984 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 14 [2023-02-15 18:22:12,992 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 24 treesize of output 20 [2023-02-15 18:22:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:13,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926425923] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:13,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:13,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 127 [2023-02-15 18:22:13,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91178033] [2023-02-15 18:22:13,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:13,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2023-02-15 18:22:13,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:13,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2023-02-15 18:22:13,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=15626, Unknown=0, NotChecked=0, Total=16002 [2023-02-15 18:22:13,081 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 127 states, 127 states have (on average 1.9763779527559056) internal successors, (251), 127 states have internal predecessors, (251), 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 18:22:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:16,019 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2023-02-15 18:22:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-15 18:22:16,019 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.9763779527559056) internal successors, (251), 127 states have internal predecessors, (251), 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 125 [2023-02-15 18:22:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:16,020 INFO L225 Difference]: With dead ends: 133 [2023-02-15 18:22:16,020 INFO L226 Difference]: Without dead ends: 131 [2023-02-15 18:22:16,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4497 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=640, Invalid=24800, Unknown=0, NotChecked=0, Total=25440 [2023-02-15 18:22:16,022 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 2985 mSDsCounter, 0 mSdLazyCounter, 9110 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 9141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 9110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:16,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 3021 Invalid, 9141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 9110 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-15 18:22:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-15 18:22:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2023-02-15 18:22:16,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 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 18:22:16,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-02-15 18:22:16,063 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 125 [2023-02-15 18:22:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:16,064 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-02-15 18:22:16,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.9763779527559056) internal successors, (251), 127 states have internal predecessors, (251), 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 18:22:16,064 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-02-15 18:22:16,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-02-15 18:22:16,064 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:16,065 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:16,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:16,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-02-15 18:22:16,270 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:16,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:16,271 INFO L85 PathProgramCache]: Analyzing trace with hash -294352235, now seen corresponding path program 57 times [2023-02-15 18:22:16,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:16,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977942659] [2023-02-15 18:22:16,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:16,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1277 proven. 553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:17,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:17,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977942659] [2023-02-15 18:22:17,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977942659] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:17,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663994400] [2023-02-15 18:22:17,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:22:17,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:17,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:17,528 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:17,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-02-15 18:22:28,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2023-02-15 18:22:28,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:28,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 18:22:28,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:29,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:30,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663994400] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:30,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:30,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 98 [2023-02-15 18:22:30,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894607076] [2023-02-15 18:22:30,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:30,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-02-15 18:22:30,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:30,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-02-15 18:22:30,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2181, Invalid=7325, Unknown=0, NotChecked=0, Total=9506 [2023-02-15 18:22:30,549 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 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 18:22:31,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:31,013 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2023-02-15 18:22:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-15 18:22:31,013 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 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 128 [2023-02-15 18:22:31,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:31,013 INFO L225 Difference]: With dead ends: 233 [2023-02-15 18:22:31,014 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 18:22:31,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 161 SyntacticMatches, 62 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7735 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3762, Invalid=12750, Unknown=0, NotChecked=0, Total=16512 [2023-02-15 18:22:31,015 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 333 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:31,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 313 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:22:31,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 18:22:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 130. [2023-02-15 18:22:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 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 18:22:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2023-02-15 18:22:31,057 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 128 [2023-02-15 18:22:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:31,057 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2023-02-15 18:22:31,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 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 18:22:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2023-02-15 18:22:31,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-02-15 18:22:31,058 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:31,058 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:31,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:31,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-02-15 18:22:31,269 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:31,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:31,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1642228683, now seen corresponding path program 58 times [2023-02-15 18:22:31,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:31,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710334254] [2023-02-15 18:22:31,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:31,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:33,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:33,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710334254] [2023-02-15 18:22:33,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710334254] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:33,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643837397] [2023-02-15 18:22:33,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:22:33,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:33,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:33,182 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:33,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-02-15 18:22:35,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:22:35,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:35,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 141 conjunts are in the unsatisfiable core [2023-02-15 18:22:35,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:35,589 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 15 treesize of output 11 [2023-02-15 18:22:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:36,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:37,232 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 14 [2023-02-15 18:22:37,233 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 24 treesize of output 20 [2023-02-15 18:22:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:37,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643837397] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:37,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:37,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 67, 67] total 100 [2023-02-15 18:22:37,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54818061] [2023-02-15 18:22:37,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:37,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-02-15 18:22:37,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:37,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-02-15 18:22:37,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=9634, Unknown=0, NotChecked=0, Total=9900 [2023-02-15 18:22:37,319 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 100 states, 100 states have (on average 2.25) internal successors, (225), 100 states have internal predecessors, (225), 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 18:22:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:40,057 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2023-02-15 18:22:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-02-15 18:22:40,057 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.25) internal successors, (225), 100 states have internal predecessors, (225), 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 129 [2023-02-15 18:22:40,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:40,058 INFO L225 Difference]: With dead ends: 137 [2023-02-15 18:22:40,058 INFO L226 Difference]: Without dead ends: 135 [2023-02-15 18:22:40,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 219 SyntacticMatches, 5 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=524, Invalid=17836, Unknown=0, NotChecked=0, Total=18360 [2023-02-15 18:22:40,059 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 49 mSDsluCounter, 2292 mSDsCounter, 0 mSdLazyCounter, 7411 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 7445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 7411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:40,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 2328 Invalid, 7445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 7411 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-15 18:22:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-15 18:22:40,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2023-02-15 18:22:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 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 18:22:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2023-02-15 18:22:40,103 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 129 [2023-02-15 18:22:40,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:40,103 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2023-02-15 18:22:40,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.25) internal successors, (225), 100 states have internal predecessors, (225), 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 18:22:40,103 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2023-02-15 18:22:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-02-15 18:22:40,104 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:40,104 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:40,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:40,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:40,314 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:40,314 INFO L85 PathProgramCache]: Analyzing trace with hash -332980014, now seen corresponding path program 59 times [2023-02-15 18:22:40,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:40,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171879453] [2023-02-15 18:22:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:40,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1366 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:41,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:41,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171879453] [2023-02-15 18:22:41,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171879453] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:41,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865085556] [2023-02-15 18:22:41,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:22:41,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:41,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:41,447 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:41,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-02-15 18:22:44,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2023-02-15 18:22:44,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:44,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-15 18:22:44,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:45,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:46,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865085556] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:46,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:46,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 101 [2023-02-15 18:22:46,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300054108] [2023-02-15 18:22:46,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:46,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-02-15 18:22:46,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:46,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-02-15 18:22:46,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2315, Invalid=7785, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 18:22:46,483 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 101 states, 101 states have (on average 2.3069306930693068) internal successors, (233), 101 states have internal predecessors, (233), 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 18:22:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:46,980 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2023-02-15 18:22:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-15 18:22:46,981 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.3069306930693068) internal successors, (233), 101 states have internal predecessors, (233), 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 132 [2023-02-15 18:22:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:46,982 INFO L225 Difference]: With dead ends: 240 [2023-02-15 18:22:46,982 INFO L226 Difference]: Without dead ends: 140 [2023-02-15 18:22:46,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 166 SyntacticMatches, 64 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8225 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3995, Invalid=13561, Unknown=0, NotChecked=0, Total=17556 [2023-02-15 18:22:46,987 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 421 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:46,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 350 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:22:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-15 18:22:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2023-02-15 18:22:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 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 18:22:47,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2023-02-15 18:22:47,045 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 132 [2023-02-15 18:22:47,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:47,045 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2023-02-15 18:22:47,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.3069306930693068) internal successors, (233), 101 states have internal predecessors, (233), 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 18:22:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2023-02-15 18:22:47,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-15 18:22:47,046 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:47,046 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:47,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-02-15 18:22:47,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:47,256 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:47,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:47,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1186297608, now seen corresponding path program 60 times [2023-02-15 18:22:47,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:47,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765806918] [2023-02-15 18:22:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:47,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:22:49,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:49,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765806918] [2023-02-15 18:22:49,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765806918] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:49,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930600020] [2023-02-15 18:22:49,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:22:49,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:49,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:49,381 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:49,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process