./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/MultCommutative-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 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/recursive/MultCommutative-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-15 00:46:49,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 00:46:49,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 00:46:49,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 00:46:49,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 00:46:49,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 00:46:49,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 00:46:49,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 00:46:49,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 00:46:49,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 00:46:49,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 00:46:49,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 00:46:49,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 00:46:49,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 00:46:49,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 00:46:49,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 00:46:49,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 00:46:49,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 00:46:49,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 00:46:49,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 00:46:49,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 00:46:49,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 00:46:49,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 00:46:49,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 00:46:49,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 00:46:49,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 00:46:49,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 00:46:49,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 00:46:49,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 00:46:49,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 00:46:49,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 00:46:49,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 00:46:49,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 00:46:49,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 00:46:49,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 00:46:49,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 00:46:49,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 00:46:49,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 00:46:49,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 00:46:49,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 00:46:49,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 00:46:49,734 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 00:46:49,761 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 00:46:49,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 00:46:49,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 00:46:49,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 00:46:49,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 00:46:49,763 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 00:46:49,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 00:46:49,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 00:46:49,764 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 00:46:49,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 00:46:49,764 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 00:46:49,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 00:46:49,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 00:46:49,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 00:46:49,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 00:46:49,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 00:46:49,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 00:46:49,765 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 00:46:49,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 00:46:49,766 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 00:46:49,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 00:46:49,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 00:46:49,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 00:46:49,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 00:46:49,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 00:46:49,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 00:46:49,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 00:46:49,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 00:46:49,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 00:46:49,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 00:46:49,767 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 00:46:49,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 00:46:49,768 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 00:46:49,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 00:46:49,768 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 00:46:49,768 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2023-02-15 00:46:49,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 00:46:49,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 00:46:49,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 00:46:49,988 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 00:46:49,989 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 00:46:49,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/MultCommutative-2.c [2023-02-15 00:46:50,999 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 00:46:51,108 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 00:46:51,108 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c [2023-02-15 00:46:51,112 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b308be7/fce9596754214754836575d926761850/FLAG2fd222fe7 [2023-02-15 00:46:51,123 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b308be7/fce9596754214754836575d926761850 [2023-02-15 00:46:51,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 00:46:51,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 00:46:51,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 00:46:51,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 00:46:51,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 00:46:51,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:46:51" (1/1) ... [2023-02-15 00:46:51,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68ce2418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51, skipping insertion in model container [2023-02-15 00:46:51,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:46:51" (1/1) ... [2023-02-15 00:46:51,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 00:46:51,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 00:46:51,239 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/recursive/MultCommutative-2.c[970,983] [2023-02-15 00:46:51,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 00:46:51,248 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 00:46:51,257 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/recursive/MultCommutative-2.c[970,983] [2023-02-15 00:46:51,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 00:46:51,266 INFO L208 MainTranslator]: Completed translation [2023-02-15 00:46:51,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51 WrapperNode [2023-02-15 00:46:51,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 00:46:51,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 00:46:51,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 00:46:51,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 00:46:51,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51" (1/1) ... [2023-02-15 00:46:51,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51" (1/1) ... [2023-02-15 00:46:51,285 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-02-15 00:46:51,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 00:46:51,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 00:46:51,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 00:46:51,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 00:46:51,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51" (1/1) ... [2023-02-15 00:46:51,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51" (1/1) ... [2023-02-15 00:46:51,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51" (1/1) ... [2023-02-15 00:46:51,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51" (1/1) ... [2023-02-15 00:46:51,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51" (1/1) ... [2023-02-15 00:46:51,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51" (1/1) ... [2023-02-15 00:46:51,295 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51" (1/1) ... [2023-02-15 00:46:51,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51" (1/1) ... [2023-02-15 00:46:51,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 00:46:51,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 00:46:51,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 00:46:51,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 00:46:51,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51" (1/1) ... [2023-02-15 00:46:51,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 00:46:51,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:46:51,319 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 00:46:51,321 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 00:46:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 00:46:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2023-02-15 00:46:51,342 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2023-02-15 00:46:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 00:46:51,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 00:46:51,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 00:46:51,381 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 00:46:51,383 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 00:46:51,476 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 00:46:51,480 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 00:46:51,480 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 00:46:51,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:46:51 BoogieIcfgContainer [2023-02-15 00:46:51,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 00:46:51,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 00:46:51,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 00:46:51,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 00:46:51,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:46:51" (1/3) ... [2023-02-15 00:46:51,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743cd719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:46:51, skipping insertion in model container [2023-02-15 00:46:51,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:46:51" (2/3) ... [2023-02-15 00:46:51,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743cd719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:46:51, skipping insertion in model container [2023-02-15 00:46:51,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:46:51" (3/3) ... [2023-02-15 00:46:51,487 INFO L112 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2023-02-15 00:46:51,505 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 00:46:51,505 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 00:46:51,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 00:46:51,539 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;@79d8e760, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 00:46:51,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 00:46:51,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 00:46:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 00:46:51,548 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:46:51,548 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:46:51,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:46:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:46:51,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1513944532, now seen corresponding path program 1 times [2023-02-15 00:46:51,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:46:51,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650168774] [2023-02-15 00:46:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:46:51,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:46:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:51,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:46:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:51,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 00:46:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 00:46:51,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:46:51,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650168774] [2023-02-15 00:46:51,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650168774] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:46:51,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:46:51,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 00:46:51,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23978902] [2023-02-15 00:46:51,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:46:51,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 00:46:51,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:46:51,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 00:46:51,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 00:46:51,947 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 00:46:52,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:46:52,046 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2023-02-15 00:46:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 00:46:52,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-02-15 00:46:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:46:52,054 INFO L225 Difference]: With dead ends: 44 [2023-02-15 00:46:52,065 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 00:46:52,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-15 00:46:52,071 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:46:52,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 151 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:46:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 00:46:52,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-02-15 00:46:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 00:46:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-02-15 00:46:52,114 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 20 [2023-02-15 00:46:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:46:52,115 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-02-15 00:46:52,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 00:46:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-02-15 00:46:52,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 00:46:52,118 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:46:52,119 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:46:52,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 00:46:52,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:46:52,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:46:52,120 INFO L85 PathProgramCache]: Analyzing trace with hash 555960324, now seen corresponding path program 1 times [2023-02-15 00:46:52,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:46:52,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689993363] [2023-02-15 00:46:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:46:52,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:46:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:52,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:46:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:52,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 00:46:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:52,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:46:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 00:46:52,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:46:52,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689993363] [2023-02-15 00:46:52,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689993363] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:46:52,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584105222] [2023-02-15 00:46:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:46:52,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:46:52,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:46:52,319 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 00:46:52,320 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 00:46:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:52,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 00:46:52,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:46:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:46:52,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:46:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:46:52,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584105222] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:46:52,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:46:52,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2023-02-15 00:46:52,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957381244] [2023-02-15 00:46:52,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:46:52,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 00:46:52,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:46:52,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 00:46:52,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-02-15 00:46:52,548 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 00:46:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:46:52,703 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2023-02-15 00:46:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 00:46:52,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2023-02-15 00:46:52,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:46:52,709 INFO L225 Difference]: With dead ends: 52 [2023-02-15 00:46:52,709 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 00:46:52,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-02-15 00:46:52,711 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:46:52,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 113 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:46:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 00:46:52,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-02-15 00:46:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 00:46:52,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-02-15 00:46:52,721 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 26 [2023-02-15 00:46:52,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:46:52,721 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-02-15 00:46:52,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 00:46:52,722 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-02-15 00:46:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 00:46:52,724 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:46:52,724 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:46:52,734 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 00:46:52,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:46:52,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:46:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:46:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash 2011031750, now seen corresponding path program 1 times [2023-02-15 00:46:52,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:46:52,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333332966] [2023-02-15 00:46:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:46:52,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:46:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:52,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:46:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:52,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:52,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 00:46:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 00:46:53,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:46:53,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333332966] [2023-02-15 00:46:53,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333332966] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:46:53,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:46:53,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 00:46:53,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553675002] [2023-02-15 00:46:53,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:46:53,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 00:46:53,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:46:53,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 00:46:53,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 00:46:53,025 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 00:46:53,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:46:53,063 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2023-02-15 00:46:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 00:46:53,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2023-02-15 00:46:53,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:46:53,064 INFO L225 Difference]: With dead ends: 31 [2023-02-15 00:46:53,064 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 00:46:53,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 00:46:53,065 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:46:53,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 43 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:46:53,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 00:46:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-15 00:46:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 00:46:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-02-15 00:46:53,069 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 27 [2023-02-15 00:46:53,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:46:53,070 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-02-15 00:46:53,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 00:46:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-02-15 00:46:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 00:46:53,071 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:46:53,071 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:46:53,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 00:46:53,071 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:46:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:46:53,072 INFO L85 PathProgramCache]: Analyzing trace with hash -760266050, now seen corresponding path program 2 times [2023-02-15 00:46:53,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:46:53,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706367722] [2023-02-15 00:46:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:46:53,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:46:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:53,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:46:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:53,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:53,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 00:46:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:53,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 00:46:53,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:46:53,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706367722] [2023-02-15 00:46:53,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706367722] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:46:53,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179917779] [2023-02-15 00:46:53,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:46:53,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:46:53,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:46:53,511 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 00:46:53,513 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 00:46:53,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:46:53,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:46:53,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-15 00:46:53,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:46:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 00:46:53,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:46:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 00:46:54,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179917779] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:46:54,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:46:54,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 15] total 33 [2023-02-15 00:46:54,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156283826] [2023-02-15 00:46:54,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:46:54,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 00:46:54,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:46:54,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 00:46:54,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 00:46:54,392 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 33 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) [2023-02-15 00:46:54,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:46:54,908 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-02-15 00:46:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 00:46:54,908 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) Word has length 34 [2023-02-15 00:46:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:46:54,909 INFO L225 Difference]: With dead ends: 53 [2023-02-15 00:46:54,909 INFO L226 Difference]: Without dead ends: 45 [2023-02-15 00:46:54,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=1759, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 00:46:54,911 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 00:46:54,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 177 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 00:46:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-15 00:46:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2023-02-15 00:46:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 26 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (21), 9 states have call predecessors, (21), 6 states have call successors, (21) [2023-02-15 00:46:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 53 transitions. [2023-02-15 00:46:54,917 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 53 transitions. Word has length 34 [2023-02-15 00:46:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:46:54,917 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 53 transitions. [2023-02-15 00:46:54,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) [2023-02-15 00:46:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 53 transitions. [2023-02-15 00:46:54,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 00:46:54,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:46:54,919 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:46:54,927 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 00:46:55,123 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 00:46:55,125 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:46:55,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:46:55,126 INFO L85 PathProgramCache]: Analyzing trace with hash -757286924, now seen corresponding path program 1 times [2023-02-15 00:46:55,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:46:55,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511108454] [2023-02-15 00:46:55,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:46:55,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:46:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:55,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:46:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:55,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:55,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 00:46:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:55,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:55,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:46:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:55,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 00:46:55,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:46:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511108454] [2023-02-15 00:46:55,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511108454] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:46:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158048053] [2023-02-15 00:46:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:46:55,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:46:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:46:55,240 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 00:46:55,243 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 00:46:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:55,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 00:46:55,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:46:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-15 00:46:55,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:46:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-15 00:46:55,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158048053] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:46:55,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:46:55,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2023-02-15 00:46:55,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193282247] [2023-02-15 00:46:55,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:46:55,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 00:46:55,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:46:55,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 00:46:55,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-02-15 00:46:55,451 INFO L87 Difference]: Start difference. First operand 37 states and 53 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-02-15 00:46:55,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:46:55,500 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2023-02-15 00:46:55,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 00:46:55,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 47 [2023-02-15 00:46:55,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:46:55,503 INFO L225 Difference]: With dead ends: 57 [2023-02-15 00:46:55,503 INFO L226 Difference]: Without dead ends: 23 [2023-02-15 00:46:55,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-02-15 00:46:55,508 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:46:55,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:46:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-15 00:46:55,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-15 00:46:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 00:46:55,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-02-15 00:46:55,515 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 47 [2023-02-15 00:46:55,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:46:55,516 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-02-15 00:46:55,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-02-15 00:46:55,516 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-02-15 00:46:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 00:46:55,520 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:46:55,520 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:46:55,524 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 00:46:55,720 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 00:46:55,720 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:46:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:46:55,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1519724908, now seen corresponding path program 3 times [2023-02-15 00:46:55,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:46:55,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144594199] [2023-02-15 00:46:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:46:55,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:46:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:55,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:46:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:55,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:56,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:56,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-15 00:46:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:56,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:56,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-15 00:46:56,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:46:56,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144594199] [2023-02-15 00:46:56,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144594199] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:46:56,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302466107] [2023-02-15 00:46:56,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 00:46:56,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:46:56,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:46:56,226 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 00:46:56,228 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 00:46:56,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-15 00:46:56,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:46:56,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-15 00:46:56,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:46:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-15 00:46:56,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:46:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 11 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 00:46:57,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302466107] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:46:57,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:46:57,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 18] total 36 [2023-02-15 00:46:57,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119723488] [2023-02-15 00:46:57,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:46:57,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 00:46:57,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:46:57,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 00:46:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 00:46:57,413 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 36 states, 32 states have (on average 1.5) internal successors, (48), 24 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2023-02-15 00:46:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:46:57,869 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-02-15 00:46:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 00:46:57,869 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 24 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) Word has length 48 [2023-02-15 00:46:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:46:57,872 INFO L225 Difference]: With dead ends: 36 [2023-02-15 00:46:57,872 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 00:46:57,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=2076, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 00:46:57,873 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 00:46:57,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 177 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 00:46:57,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 00:46:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-15 00:46:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 00:46:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-02-15 00:46:57,877 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 48 [2023-02-15 00:46:57,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:46:57,877 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-02-15 00:46:57,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 24 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2023-02-15 00:46:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-02-15 00:46:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-15 00:46:57,878 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:46:57,878 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:46:57,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 00:46:58,084 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 00:46:58,086 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:46:58,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:46:58,086 INFO L85 PathProgramCache]: Analyzing trace with hash -826569506, now seen corresponding path program 4 times [2023-02-15 00:46:58,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:46:58,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289567155] [2023-02-15 00:46:58,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:46:58,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:46:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:58,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:46:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:58,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:58,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:58,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:58,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-15 00:46:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:58,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:58,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:58,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:46:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:46:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 82 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-02-15 00:46:58,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:46:58,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289567155] [2023-02-15 00:46:58,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289567155] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:46:58,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259715525] [2023-02-15 00:46:58,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 00:46:58,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:46:58,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:46:58,659 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 00:46:58,679 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 00:46:58,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 00:46:58,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:46:58,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 97 conjunts are in the unsatisfiable core [2023-02-15 00:46:58,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:46:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-15 00:46:59,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:47:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 14 proven. 112 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 00:47:00,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259715525] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:47:00,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:47:00,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 21] total 42 [2023-02-15 00:47:00,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552839687] [2023-02-15 00:47:00,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:47:00,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 00:47:00,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:47:00,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 00:47:00,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 00:47:00,387 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 42 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (16), 15 states have call predecessors, (16), 10 states have call successors, (16) [2023-02-15 00:47:00,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:47:00,947 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-02-15 00:47:00,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 00:47:00,947 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (16), 15 states have call predecessors, (16), 10 states have call successors, (16) Word has length 62 [2023-02-15 00:47:00,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:47:00,948 INFO L225 Difference]: With dead ends: 39 [2023-02-15 00:47:00,948 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 00:47:00,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=342, Invalid=2850, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 00:47:00,949 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 00:47:00,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 218 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 00:47:00,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 00:47:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-15 00:47:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 00:47:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-02-15 00:47:00,952 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 62 [2023-02-15 00:47:00,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:47:00,952 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-02-15 00:47:00,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (16), 15 states have call predecessors, (16), 10 states have call successors, (16) [2023-02-15 00:47:00,952 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-02-15 00:47:00,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-15 00:47:00,953 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:47:00,953 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:47:00,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 00:47:01,158 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 00:47:01,158 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:47:01,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:47:01,159 INFO L85 PathProgramCache]: Analyzing trace with hash -529248084, now seen corresponding path program 5 times [2023-02-15 00:47:01,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:47:01,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600631552] [2023-02-15 00:47:01,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:47:01,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:47:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:01,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:47:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:01,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:01,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:01,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:01,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:01,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-15 00:47:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:01,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:01,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:01,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:01,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 134 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-15 00:47:01,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:47:01,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600631552] [2023-02-15 00:47:01,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600631552] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:47:01,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360806921] [2023-02-15 00:47:01,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 00:47:01,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:47:01,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:47:01,890 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 00:47:01,892 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 00:47:01,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-02-15 00:47:01,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:47:01,946 WARN L261 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 121 conjunts are in the unsatisfiable core [2023-02-15 00:47:01,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:47:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 4 proven. 132 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-15 00:47:02,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:47:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 17 proven. 197 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-15 00:47:04,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360806921] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:47:04,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:47:04,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 24] total 48 [2023-02-15 00:47:04,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959259199] [2023-02-15 00:47:04,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:47:04,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 00:47:04,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:47:04,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 00:47:04,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2080, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 00:47:04,166 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 48 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 30 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2023-02-15 00:47:04,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:47:04,907 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2023-02-15 00:47:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 00:47:04,911 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 30 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) Word has length 76 [2023-02-15 00:47:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:47:04,912 INFO L225 Difference]: With dead ends: 42 [2023-02-15 00:47:04,912 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 00:47:04,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=412, Invalid=3748, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 00:47:04,914 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 00:47:04,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 302 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 00:47:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 00:47:04,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-15 00:47:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-15 00:47:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-02-15 00:47:04,919 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 76 [2023-02-15 00:47:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:47:04,920 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-02-15 00:47:04,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 30 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2023-02-15 00:47:04,920 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-02-15 00:47:04,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-15 00:47:04,920 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:47:04,921 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:47:04,926 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 00:47:05,122 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 00:47:05,123 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:47:05,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:47:05,123 INFO L85 PathProgramCache]: Analyzing trace with hash -495284482, now seen corresponding path program 6 times [2023-02-15 00:47:05,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:47:05,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549758972] [2023-02-15 00:47:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:47:05,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:47:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:05,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:47:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:05,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:05,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:05,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:05,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:05,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:05,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-15 00:47:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:05,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:05,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:06,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:06,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:06,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 198 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-02-15 00:47:06,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:47:06,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549758972] [2023-02-15 00:47:06,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549758972] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:47:06,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563292197] [2023-02-15 00:47:06,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 00:47:06,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:47:06,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:47:06,077 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 00:47:06,079 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 00:47:06,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-02-15 00:47:06,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:47:06,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 144 conjunts are in the unsatisfiable core [2023-02-15 00:47:06,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:47:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-02-15 00:47:06,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:47:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 23 proven. 309 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-15 00:47:09,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563292197] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:47:09,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:47:09,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 31] total 59 [2023-02-15 00:47:09,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811554285] [2023-02-15 00:47:09,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:47:09,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-15 00:47:09,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:47:09,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-15 00:47:09,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=3187, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 00:47:09,605 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 59 states, 54 states have (on average 1.5) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (24), 21 states have call predecessors, (24), 13 states have call successors, (24) [2023-02-15 00:47:10,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:47:10,421 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2023-02-15 00:47:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 00:47:10,422 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 54 states have (on average 1.5) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (24), 21 states have call predecessors, (24), 13 states have call successors, (24) Word has length 90 [2023-02-15 00:47:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:47:10,422 INFO L225 Difference]: With dead ends: 45 [2023-02-15 00:47:10,422 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 00:47:10,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 159 SyntacticMatches, 18 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=573, Invalid=5433, Unknown=0, NotChecked=0, Total=6006 [2023-02-15 00:47:10,425 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 00:47:10,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 288 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 00:47:10,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 00:47:10,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-15 00:47:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-15 00:47:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-02-15 00:47:10,433 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 90 [2023-02-15 00:47:10,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:47:10,433 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-02-15 00:47:10,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 54 states have (on average 1.5) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (24), 21 states have call predecessors, (24), 13 states have call successors, (24) [2023-02-15 00:47:10,433 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-02-15 00:47:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-15 00:47:10,435 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:47:10,435 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:47:10,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 00:47:10,637 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 00:47:10,638 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:47:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:47:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1413185516, now seen corresponding path program 7 times [2023-02-15 00:47:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:47:10,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502111501] [2023-02-15 00:47:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:47:10,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:47:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:10,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:47:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-02-15 00:47:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 42 proven. 274 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2023-02-15 00:47:11,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:47:11,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502111501] [2023-02-15 00:47:11,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502111501] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:47:11,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061010845] [2023-02-15 00:47:11,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 00:47:11,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:47:11,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:47:11,785 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 00:47:11,787 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 00:47:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:11,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 169 conjunts are in the unsatisfiable core [2023-02-15 00:47:11,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:47:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 6 proven. 270 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2023-02-15 00:47:12,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:47:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 23 proven. 439 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2023-02-15 00:47:15,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061010845] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:47:15,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:47:15,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 30] total 60 [2023-02-15 00:47:15,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927503274] [2023-02-15 00:47:15,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:47:15,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-15 00:47:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:47:15,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-15 00:47:15,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=3316, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 00:47:15,442 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 60 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 36 states have internal predecessors, (80), 13 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2023-02-15 00:47:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:47:16,222 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2023-02-15 00:47:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 00:47:16,223 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 36 states have internal predecessors, (80), 13 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) Word has length 104 [2023-02-15 00:47:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:47:16,224 INFO L225 Difference]: With dead ends: 48 [2023-02-15 00:47:16,224 INFO L226 Difference]: Without dead ends: 38 [2023-02-15 00:47:16,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 200 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=564, Invalid=5916, Unknown=0, NotChecked=0, Total=6480 [2023-02-15 00:47:16,225 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 101 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 00:47:16,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 262 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 00:47:16,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-15 00:47:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-02-15 00:47:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-15 00:47:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-02-15 00:47:16,234 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 104 [2023-02-15 00:47:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:47:16,234 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-02-15 00:47:16,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 36 states have internal predecessors, (80), 13 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2023-02-15 00:47:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-02-15 00:47:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-15 00:47:16,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:47:16,235 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:47:16,240 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 00:47:16,435 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 00:47:16,435 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:47:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:47:16,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1686718750, now seen corresponding path program 8 times [2023-02-15 00:47:16,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:47:16,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867586784] [2023-02-15 00:47:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:47:16,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:47:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:16,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:47:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:16,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:16,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-02-15 00:47:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 50 proven. 362 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-15 00:47:17,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:47:17,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867586784] [2023-02-15 00:47:17,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867586784] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:47:17,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765162531] [2023-02-15 00:47:17,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:47:17,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:47:17,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:47:17,787 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 00:47:17,801 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 00:47:17,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:47:17,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:47:17,896 WARN L261 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 193 conjunts are in the unsatisfiable core [2023-02-15 00:47:17,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:47:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 7 proven. 357 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2023-02-15 00:47:18,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:47:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 26 proven. 596 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-02-15 00:47:22,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765162531] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:47:22,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:47:22,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 33] total 66 [2023-02-15 00:47:22,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995097451] [2023-02-15 00:47:22,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:47:22,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-15 00:47:22,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:47:22,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-15 00:47:22,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4042, Unknown=0, NotChecked=0, Total=4290 [2023-02-15 00:47:22,313 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 66 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 39 states have internal predecessors, (88), 14 states have call successors, (14), 1 states have call predecessors, (14), 17 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2023-02-15 00:47:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:47:23,292 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-02-15 00:47:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 00:47:23,292 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 39 states have internal predecessors, (88), 14 states have call successors, (14), 1 states have call predecessors, (14), 17 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) Word has length 118 [2023-02-15 00:47:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:47:23,293 INFO L225 Difference]: With dead ends: 51 [2023-02-15 00:47:23,293 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 00:47:23,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 228 SyntacticMatches, 14 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2114 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=646, Invalid=7186, Unknown=0, NotChecked=0, Total=7832 [2023-02-15 00:47:23,295 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 00:47:23,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 392 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 00:47:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 00:47:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-15 00:47:23,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 00:47:23,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-02-15 00:47:23,299 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 118 [2023-02-15 00:47:23,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:47:23,299 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-02-15 00:47:23,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 39 states have internal predecessors, (88), 14 states have call successors, (14), 1 states have call predecessors, (14), 17 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2023-02-15 00:47:23,299 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-02-15 00:47:23,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-02-15 00:47:23,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:47:23,300 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:47:23,304 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 00:47:23,504 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 00:47:23,504 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:47:23,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:47:23,505 INFO L85 PathProgramCache]: Analyzing trace with hash 80066348, now seen corresponding path program 9 times [2023-02-15 00:47:23,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:47:23,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091331543] [2023-02-15 00:47:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:47:23,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:47:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:23,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:47:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:24,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:24,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:24,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:24,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:24,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:24,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:24,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:24,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:24,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-02-15 00:47:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:24,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:24,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:25,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:25,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:25,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:25,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:25,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:25,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 58 proven. 462 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-02-15 00:47:25,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:47:25,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091331543] [2023-02-15 00:47:25,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091331543] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:47:25,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641866747] [2023-02-15 00:47:25,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 00:47:25,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:47:25,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:47:25,286 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 00:47:25,310 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 00:47:25,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2023-02-15 00:47:25,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:47:25,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 217 conjunts are in the unsatisfiable core [2023-02-15 00:47:25,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:47:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 8 proven. 456 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2023-02-15 00:47:26,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:47:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 29 proven. 777 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-02-15 00:47:30,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641866747] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:47:30,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:47:30,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 36] total 72 [2023-02-15 00:47:30,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081961711] [2023-02-15 00:47:30,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:47:30,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-02-15 00:47:30,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:47:30,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-02-15 00:47:30,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=4840, Unknown=0, NotChecked=0, Total=5112 [2023-02-15 00:47:30,699 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 72 states, 68 states have (on average 1.411764705882353) internal successors, (96), 42 states have internal predecessors, (96), 15 states have call successors, (15), 1 states have call predecessors, (15), 19 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2023-02-15 00:47:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:47:31,777 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-02-15 00:47:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-15 00:47:31,777 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 68 states have (on average 1.411764705882353) internal successors, (96), 42 states have internal predecessors, (96), 15 states have call successors, (15), 1 states have call predecessors, (15), 19 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) Word has length 132 [2023-02-15 00:47:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:47:31,779 INFO L225 Difference]: With dead ends: 54 [2023-02-15 00:47:31,779 INFO L226 Difference]: Without dead ends: 44 [2023-02-15 00:47:31,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 256 SyntacticMatches, 16 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=732, Invalid=8580, Unknown=0, NotChecked=0, Total=9312 [2023-02-15 00:47:31,781 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 00:47:31,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 349 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 00:47:31,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-15 00:47:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-15 00:47:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-15 00:47:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-02-15 00:47:31,784 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 132 [2023-02-15 00:47:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:47:31,784 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-02-15 00:47:31,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 68 states have (on average 1.411764705882353) internal successors, (96), 42 states have internal predecessors, (96), 15 states have call successors, (15), 1 states have call predecessors, (15), 19 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2023-02-15 00:47:31,785 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-02-15 00:47:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-02-15 00:47:31,785 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:47:31,786 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:47:31,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 00:47:31,994 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 00:47:31,994 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:47:31,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:47:31,994 INFO L85 PathProgramCache]: Analyzing trace with hash 293911358, now seen corresponding path program 10 times [2023-02-15 00:47:31,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:47:31,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424001172] [2023-02-15 00:47:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:47:31,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:47:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:32,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:47:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:32,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:32,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:32,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:32,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:32,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-02-15 00:47:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 66 proven. 574 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2023-02-15 00:47:33,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:47:33,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424001172] [2023-02-15 00:47:33,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424001172] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:47:33,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508122936] [2023-02-15 00:47:33,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 00:47:33,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:47:33,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:47:33,953 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 00:47:33,955 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 00:47:34,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 00:47:34,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:47:34,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 241 conjunts are in the unsatisfiable core [2023-02-15 00:47:34,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:47:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 9 proven. 567 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2023-02-15 00:47:35,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:47:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 32 proven. 982 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-02-15 00:47:40,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508122936] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:47:40,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:47:40,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 39] total 78 [2023-02-15 00:47:40,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721137851] [2023-02-15 00:47:40,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:47:40,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-02-15 00:47:40,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:47:40,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-02-15 00:47:40,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=5710, Unknown=0, NotChecked=0, Total=6006 [2023-02-15 00:47:40,517 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 78 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 45 states have internal predecessors, (104), 16 states have call successors, (16), 1 states have call predecessors, (16), 21 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2023-02-15 00:47:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:47:41,877 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-02-15 00:47:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-15 00:47:41,878 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 45 states have internal predecessors, (104), 16 states have call successors, (16), 1 states have call predecessors, (16), 21 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) Word has length 146 [2023-02-15 00:47:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:47:41,878 INFO L225 Difference]: With dead ends: 57 [2023-02-15 00:47:41,878 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 00:47:41,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 284 SyntacticMatches, 18 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3022 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=822, Invalid=10098, Unknown=0, NotChecked=0, Total=10920 [2023-02-15 00:47:41,880 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 114 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 00:47:41,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 604 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 00:47:41,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 00:47:41,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-15 00:47:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2023-02-15 00:47:41,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-02-15 00:47:41,888 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 146 [2023-02-15 00:47:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:47:41,889 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-02-15 00:47:41,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 45 states have internal predecessors, (104), 16 states have call successors, (16), 1 states have call predecessors, (16), 21 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2023-02-15 00:47:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-02-15 00:47:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-02-15 00:47:41,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:47:41,891 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:47:41,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 00:47:42,096 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 00:47:42,097 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:47:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:47:42,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1024592276, now seen corresponding path program 11 times [2023-02-15 00:47:42,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:47:42,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645904456] [2023-02-15 00:47:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:47:42,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:47:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:42,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:47:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:42,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:42,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:42,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:43,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:43,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:43,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:43,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:43,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:43,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:43,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:43,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-15 00:47:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:43,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:43,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:44,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:44,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:44,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:44,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:44,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:44,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:44,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:44,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 74 proven. 698 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2023-02-15 00:47:44,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:47:44,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645904456] [2023-02-15 00:47:44,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645904456] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:47:44,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753532963] [2023-02-15 00:47:44,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 00:47:44,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:47:44,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:47:44,459 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 00:47:44,461 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 00:47:44,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-02-15 00:47:44,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:47:44,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 265 conjunts are in the unsatisfiable core [2023-02-15 00:47:44,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:47:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 10 proven. 690 refuted. 0 times theorem prover too weak. 835 trivial. 0 not checked. [2023-02-15 00:47:45,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:47:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 35 proven. 1211 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-02-15 00:47:51,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753532963] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:47:51,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:47:51,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 42] total 84 [2023-02-15 00:47:51,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663165981] [2023-02-15 00:47:51,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:47:51,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-02-15 00:47:51,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:47:51,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-02-15 00:47:51,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=6652, Unknown=0, NotChecked=0, Total=6972 [2023-02-15 00:47:51,870 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 84 states, 80 states have (on average 1.4) internal successors, (112), 48 states have internal predecessors, (112), 17 states have call successors, (17), 1 states have call predecessors, (17), 23 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2023-02-15 00:47:53,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:47:53,229 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2023-02-15 00:47:53,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 00:47:53,229 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 80 states have (on average 1.4) internal successors, (112), 48 states have internal predecessors, (112), 17 states have call successors, (17), 1 states have call predecessors, (17), 23 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) Word has length 160 [2023-02-15 00:47:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:47:53,230 INFO L225 Difference]: With dead ends: 60 [2023-02-15 00:47:53,230 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 00:47:53,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 312 SyntacticMatches, 20 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3532 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=916, Invalid=11740, Unknown=0, NotChecked=0, Total=12656 [2023-02-15 00:47:53,231 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 00:47:53,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 458 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 00:47:53,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 00:47:53,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-15 00:47:53,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-15 00:47:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2023-02-15 00:47:53,235 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 160 [2023-02-15 00:47:53,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:47:53,235 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2023-02-15 00:47:53,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 80 states have (on average 1.4) internal successors, (112), 48 states have internal predecessors, (112), 17 states have call successors, (17), 1 states have call predecessors, (17), 23 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2023-02-15 00:47:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2023-02-15 00:47:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-02-15 00:47:53,236 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:47:53,237 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:47:53,254 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 00:47:53,441 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 00:47:53,442 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:47:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:47:53,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1140202146, now seen corresponding path program 12 times [2023-02-15 00:47:53,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:47:53,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064974989] [2023-02-15 00:47:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:47:53,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:47:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:53,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:47:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:54,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:54,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:54,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:54,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:54,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:54,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:54,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:55,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:55,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:55,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:55,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:55,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-02-15 00:47:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:55,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:55,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:55,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:55,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:55,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:56,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:56,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:56,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:56,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:56,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:56,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:47:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:47:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 82 proven. 834 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2023-02-15 00:47:56,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:47:56,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064974989] [2023-02-15 00:47:56,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064974989] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:47:56,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722081322] [2023-02-15 00:47:56,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 00:47:56,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:47:56,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:47:56,220 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 00:47:56,223 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 00:47:56,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2023-02-15 00:47:56,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:47:56,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 289 conjunts are in the unsatisfiable core [2023-02-15 00:47:56,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:47:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 11 proven. 825 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2023-02-15 00:47:57,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:48:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 38 proven. 1464 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2023-02-15 00:48:04,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722081322] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:48:04,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:48:04,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 45] total 90 [2023-02-15 00:48:04,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934171214] [2023-02-15 00:48:04,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:48:04,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-02-15 00:48:04,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:48:04,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-02-15 00:48:04,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=7666, Unknown=0, NotChecked=0, Total=8010 [2023-02-15 00:48:04,738 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 90 states, 86 states have (on average 1.3953488372093024) internal successors, (120), 51 states have internal predecessors, (120), 18 states have call successors, (18), 1 states have call predecessors, (18), 25 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) [2023-02-15 00:48:06,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:48:06,286 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2023-02-15 00:48:06,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 00:48:06,287 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 86 states have (on average 1.3953488372093024) internal successors, (120), 51 states have internal predecessors, (120), 18 states have call successors, (18), 1 states have call predecessors, (18), 25 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) Word has length 174 [2023-02-15 00:48:06,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:48:06,287 INFO L225 Difference]: With dead ends: 63 [2023-02-15 00:48:06,287 INFO L226 Difference]: Without dead ends: 53 [2023-02-15 00:48:06,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 340 SyntacticMatches, 22 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4086 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1014, Invalid=13506, Unknown=0, NotChecked=0, Total=14520 [2023-02-15 00:48:06,302 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 292 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 00:48:06,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 526 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 00:48:06,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-15 00:48:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-15 00:48:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2023-02-15 00:48:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2023-02-15 00:48:06,313 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 174 [2023-02-15 00:48:06,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:48:06,313 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2023-02-15 00:48:06,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 86 states have (on average 1.3953488372093024) internal successors, (120), 51 states have internal predecessors, (120), 18 states have call successors, (18), 1 states have call predecessors, (18), 25 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) [2023-02-15 00:48:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2023-02-15 00:48:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-02-15 00:48:06,315 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:48:06,315 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 24, 24, 24, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:48:06,331 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 00:48:06,521 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 00:48:06,521 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:48:06,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:48:06,522 INFO L85 PathProgramCache]: Analyzing trace with hash 831471020, now seen corresponding path program 13 times [2023-02-15 00:48:06,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:48:06,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022953208] [2023-02-15 00:48:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:48:06,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:48:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:07,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:48:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:07,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:07,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:07,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:07,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:08,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:08,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:08,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:08,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:08,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:08,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:08,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:08,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:08,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-15 00:48:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:09,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:09,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:09,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:09,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:09,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:09,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:09,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:09,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:09,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:09,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:09,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:09,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 90 proven. 982 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2023-02-15 00:48:10,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:48:10,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022953208] [2023-02-15 00:48:10,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022953208] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:48:10,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274421211] [2023-02-15 00:48:10,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 00:48:10,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:48:10,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:48:10,007 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 00:48:10,009 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 00:48:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:10,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 313 conjunts are in the unsatisfiable core [2023-02-15 00:48:10,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:48:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 12 proven. 972 refuted. 0 times theorem prover too weak. 1193 trivial. 0 not checked. [2023-02-15 00:48:11,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:48:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 41 proven. 1741 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2023-02-15 00:48:19,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274421211] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:48:19,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:48:19,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 48] total 96 [2023-02-15 00:48:19,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546243717] [2023-02-15 00:48:19,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:48:19,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-02-15 00:48:19,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:48:19,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-02-15 00:48:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=8752, Unknown=0, NotChecked=0, Total=9120 [2023-02-15 00:48:19,968 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 96 states, 92 states have (on average 1.391304347826087) internal successors, (128), 54 states have internal predecessors, (128), 19 states have call successors, (19), 1 states have call predecessors, (19), 27 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) [2023-02-15 00:48:21,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:48:21,754 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-02-15 00:48:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-15 00:48:21,754 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 92 states have (on average 1.391304347826087) internal successors, (128), 54 states have internal predecessors, (128), 19 states have call successors, (19), 1 states have call predecessors, (19), 27 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) Word has length 188 [2023-02-15 00:48:21,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:48:21,755 INFO L225 Difference]: With dead ends: 66 [2023-02-15 00:48:21,755 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 00:48:21,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 368 SyntacticMatches, 24 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4678 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1116, Invalid=15396, Unknown=0, NotChecked=0, Total=16512 [2023-02-15 00:48:21,757 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 91 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1706 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 00:48:21,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 602 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1706 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 00:48:21,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 00:48:21,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-02-15 00:48:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2023-02-15 00:48:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2023-02-15 00:48:21,760 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 188 [2023-02-15 00:48:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:48:21,760 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2023-02-15 00:48:21,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 92 states have (on average 1.391304347826087) internal successors, (128), 54 states have internal predecessors, (128), 19 states have call successors, (19), 1 states have call predecessors, (19), 27 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) [2023-02-15 00:48:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2023-02-15 00:48:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-02-15 00:48:21,761 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:48:21,761 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 26, 26, 26, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:48:21,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 00:48:21,966 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 00:48:21,967 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:48:21,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:48:21,967 INFO L85 PathProgramCache]: Analyzing trace with hash -55195778, now seen corresponding path program 14 times [2023-02-15 00:48:21,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:48:21,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636435487] [2023-02-15 00:48:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:48:21,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:48:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:22,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:48:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:22,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:23,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:23,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:23,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:23,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:23,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:23,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:24,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:24,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:24,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:24,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:24,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:24,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:24,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-02-15 00:48:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:24,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:25,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:25,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:25,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:25,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:25,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:25,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:25,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:25,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:25,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:25,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:25,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:25,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 98 proven. 1142 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-02-15 00:48:25,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:48:25,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636435487] [2023-02-15 00:48:25,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636435487] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:48:25,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314016147] [2023-02-15 00:48:25,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:48:25,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:48:25,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:48:25,927 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 00:48:25,928 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 00:48:26,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:48:26,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:48:26,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 337 conjunts are in the unsatisfiable core [2023-02-15 00:48:26,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:48:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 13 proven. 1131 refuted. 0 times theorem prover too weak. 1396 trivial. 0 not checked. [2023-02-15 00:48:27,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:48:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 44 proven. 2042 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-02-15 00:48:37,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314016147] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:48:37,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:48:37,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 51] total 102 [2023-02-15 00:48:37,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855614912] [2023-02-15 00:48:37,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:48:37,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-02-15 00:48:37,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:48:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-02-15 00:48:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=9910, Unknown=0, NotChecked=0, Total=10302 [2023-02-15 00:48:37,120 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 102 states, 98 states have (on average 1.3877551020408163) internal successors, (136), 57 states have internal predecessors, (136), 20 states have call successors, (20), 1 states have call predecessors, (20), 29 states have return successors, (46), 45 states have call predecessors, (46), 20 states have call successors, (46) [2023-02-15 00:48:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:48:39,239 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2023-02-15 00:48:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 00:48:39,239 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 98 states have (on average 1.3877551020408163) internal successors, (136), 57 states have internal predecessors, (136), 20 states have call successors, (20), 1 states have call predecessors, (20), 29 states have return successors, (46), 45 states have call predecessors, (46), 20 states have call successors, (46) Word has length 202 [2023-02-15 00:48:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:48:39,242 INFO L225 Difference]: With dead ends: 69 [2023-02-15 00:48:39,242 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 00:48:39,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 396 SyntacticMatches, 26 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5306 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1222, Invalid=17410, Unknown=0, NotChecked=0, Total=18632 [2023-02-15 00:48:39,244 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 336 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 00:48:39,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 923 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2025 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 00:48:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 00:48:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-02-15 00:48:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2023-02-15 00:48:39,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-02-15 00:48:39,247 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 202 [2023-02-15 00:48:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:48:39,247 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-02-15 00:48:39,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 98 states have (on average 1.3877551020408163) internal successors, (136), 57 states have internal predecessors, (136), 20 states have call successors, (20), 1 states have call predecessors, (20), 29 states have return successors, (46), 45 states have call predecessors, (46), 20 states have call successors, (46) [2023-02-15 00:48:39,248 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-02-15 00:48:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-02-15 00:48:39,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:48:39,249 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 28, 28, 28, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:48:39,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-15 00:48:39,454 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 00:48:39,454 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:48:39,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:48:39,454 INFO L85 PathProgramCache]: Analyzing trace with hash 361008364, now seen corresponding path program 15 times [2023-02-15 00:48:39,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:48:39,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995532278] [2023-02-15 00:48:39,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:48:39,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:48:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:40,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:48:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:40,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:40,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:40,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:41,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:41,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:41,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:41,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:41,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:41,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:41,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:42,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:42,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:42,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:42,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:42,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-02-15 00:48:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:42,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:42,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:43,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:43,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:43,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:43,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:43,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:43,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:43,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:43,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:43,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:43,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:43,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:44,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:48:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 106 proven. 1314 refuted. 0 times theorem prover too weak. 1511 trivial. 0 not checked. [2023-02-15 00:48:44,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:48:44,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995532278] [2023-02-15 00:48:44,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995532278] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:48:44,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218812564] [2023-02-15 00:48:44,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 00:48:44,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:48:44,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:48:44,019 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 00:48:44,021 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 00:48:44,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2023-02-15 00:48:44,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:48:44,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 361 conjunts are in the unsatisfiable core [2023-02-15 00:48:44,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:48:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 14 proven. 1302 refuted. 0 times theorem prover too weak. 1615 trivial. 0 not checked. [2023-02-15 00:48:46,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:48:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 47 proven. 2367 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2023-02-15 00:48:56,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218812564] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:48:56,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:48:56,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 54] total 108 [2023-02-15 00:48:56,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545530905] [2023-02-15 00:48:56,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:48:56,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-02-15 00:48:56,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:48:56,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-02-15 00:48:56,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=11140, Unknown=0, NotChecked=0, Total=11556 [2023-02-15 00:48:56,691 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 108 states, 104 states have (on average 1.3846153846153846) internal successors, (144), 60 states have internal predecessors, (144), 21 states have call successors, (21), 1 states have call predecessors, (21), 31 states have return successors, (49), 48 states have call predecessors, (49), 21 states have call successors, (49) [2023-02-15 00:48:58,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:48:58,934 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2023-02-15 00:48:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-15 00:48:58,935 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 104 states have (on average 1.3846153846153846) internal successors, (144), 60 states have internal predecessors, (144), 21 states have call successors, (21), 1 states have call predecessors, (21), 31 states have return successors, (49), 48 states have call predecessors, (49), 21 states have call successors, (49) Word has length 216 [2023-02-15 00:48:58,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:48:58,935 INFO L225 Difference]: With dead ends: 72 [2023-02-15 00:48:58,935 INFO L226 Difference]: Without dead ends: 62 [2023-02-15 00:48:58,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 424 SyntacticMatches, 28 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5982 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1332, Invalid=19548, Unknown=0, NotChecked=0, Total=20880 [2023-02-15 00:48:58,937 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 547 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 00:48:58,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 924 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 00:48:58,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-15 00:48:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-02-15 00:48:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2023-02-15 00:48:58,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2023-02-15 00:48:58,942 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 216 [2023-02-15 00:48:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:48:58,942 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2023-02-15 00:48:58,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 104 states have (on average 1.3846153846153846) internal successors, (144), 60 states have internal predecessors, (144), 21 states have call successors, (21), 1 states have call predecessors, (21), 31 states have return successors, (49), 48 states have call predecessors, (49), 21 states have call successors, (49) [2023-02-15 00:48:58,942 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2023-02-15 00:48:58,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-02-15 00:48:58,943 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:48:58,943 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:48:58,951 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 00:48:59,144 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 00:48:59,144 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:48:59,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:48:59,144 INFO L85 PathProgramCache]: Analyzing trace with hash -500866658, now seen corresponding path program 16 times [2023-02-15 00:48:59,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:48:59,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362620253] [2023-02-15 00:48:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:48:59,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:48:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:48:59,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:48:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:00,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:00,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:00,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:01,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:01,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:01,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:01,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:01,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:01,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:02,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:02,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:02,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:02,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:02,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:02,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:02,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-02-15 00:49:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:02,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:03,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:03,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:03,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:03,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:03,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:04,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:04,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:04,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:04,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:04,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:04,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:04,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:04,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:04,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3350 backedges. 114 proven. 1498 refuted. 0 times theorem prover too weak. 1738 trivial. 0 not checked. [2023-02-15 00:49:04,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:49:04,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362620253] [2023-02-15 00:49:04,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362620253] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:49:04,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559879984] [2023-02-15 00:49:04,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 00:49:04,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:49:04,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:49:04,535 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 00:49:04,536 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 00:49:04,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 00:49:04,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:49:04,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 385 conjunts are in the unsatisfiable core [2023-02-15 00:49:04,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:49:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3350 backedges. 15 proven. 1485 refuted. 0 times theorem prover too weak. 1850 trivial. 0 not checked. [2023-02-15 00:49:06,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:49:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3350 backedges. 50 proven. 2716 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2023-02-15 00:49:18,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559879984] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:49:18,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:49:18,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 57] total 114 [2023-02-15 00:49:18,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032374965] [2023-02-15 00:49:18,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:49:18,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2023-02-15 00:49:18,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:49:18,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2023-02-15 00:49:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=12442, Unknown=0, NotChecked=0, Total=12882 [2023-02-15 00:49:18,696 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 114 states, 110 states have (on average 1.3818181818181818) internal successors, (152), 63 states have internal predecessors, (152), 22 states have call successors, (22), 1 states have call predecessors, (22), 33 states have return successors, (52), 51 states have call predecessors, (52), 22 states have call successors, (52) [2023-02-15 00:49:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:49:20,881 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2023-02-15 00:49:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-15 00:49:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 110 states have (on average 1.3818181818181818) internal successors, (152), 63 states have internal predecessors, (152), 22 states have call successors, (22), 1 states have call predecessors, (22), 33 states have return successors, (52), 51 states have call predecessors, (52), 22 states have call successors, (52) Word has length 230 [2023-02-15 00:49:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:49:20,882 INFO L225 Difference]: With dead ends: 75 [2023-02-15 00:49:20,882 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 00:49:20,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 452 SyntacticMatches, 30 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6692 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1446, Invalid=21810, Unknown=0, NotChecked=0, Total=23256 [2023-02-15 00:49:20,884 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 319 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 2024 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 00:49:20,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 915 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2024 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 00:49:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 00:49:20,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-02-15 00:49:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2023-02-15 00:49:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2023-02-15 00:49:20,893 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 230 [2023-02-15 00:49:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:49:20,894 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2023-02-15 00:49:20,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 110 states have (on average 1.3818181818181818) internal successors, (152), 63 states have internal predecessors, (152), 22 states have call successors, (22), 1 states have call predecessors, (22), 33 states have return successors, (52), 51 states have call predecessors, (52), 22 states have call successors, (52) [2023-02-15 00:49:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2023-02-15 00:49:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-02-15 00:49:20,895 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:49:20,895 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 32, 32, 32, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:49:20,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 00:49:21,095 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 00:49:21,095 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:49:21,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:49:21,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1515658196, now seen corresponding path program 17 times [2023-02-15 00:49:21,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:49:21,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111956808] [2023-02-15 00:49:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:49:21,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:49:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:21,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:49:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:22,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:22,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:23,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:23,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:23,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:23,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:23,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:24,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:24,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:24,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:24,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:24,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:24,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:24,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:24,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:24,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:25,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-02-15 00:49:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:25,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:25,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:25,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:26,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:26,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:26,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:26,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:26,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:26,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:27,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:27,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:27,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:27,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:27,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:27,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:27,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 122 proven. 1694 refuted. 0 times theorem prover too weak. 1981 trivial. 0 not checked. [2023-02-15 00:49:27,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:49:27,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111956808] [2023-02-15 00:49:27,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111956808] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:49:27,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783805404] [2023-02-15 00:49:27,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 00:49:27,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:49:27,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:49:27,286 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 00:49:27,287 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 00:49:27,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2023-02-15 00:49:27,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:49:27,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 409 conjunts are in the unsatisfiable core [2023-02-15 00:49:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:49:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 16 proven. 1680 refuted. 0 times theorem prover too weak. 2101 trivial. 0 not checked. [2023-02-15 00:49:29,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:49:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 53 proven. 3089 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2023-02-15 00:49:43,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783805404] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:49:43,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:49:43,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 60] total 120 [2023-02-15 00:49:43,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665964391] [2023-02-15 00:49:43,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:49:43,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2023-02-15 00:49:43,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:49:43,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2023-02-15 00:49:43,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=13816, Unknown=0, NotChecked=0, Total=14280 [2023-02-15 00:49:43,132 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 120 states, 116 states have (on average 1.3793103448275863) internal successors, (160), 66 states have internal predecessors, (160), 23 states have call successors, (23), 1 states have call predecessors, (23), 35 states have return successors, (55), 54 states have call predecessors, (55), 23 states have call successors, (55) [2023-02-15 00:49:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:49:45,932 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2023-02-15 00:49:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-15 00:49:45,932 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 116 states have (on average 1.3793103448275863) internal successors, (160), 66 states have internal predecessors, (160), 23 states have call successors, (23), 1 states have call predecessors, (23), 35 states have return successors, (55), 54 states have call predecessors, (55), 23 states have call successors, (55) Word has length 244 [2023-02-15 00:49:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:49:45,933 INFO L225 Difference]: With dead ends: 78 [2023-02-15 00:49:45,933 INFO L226 Difference]: Without dead ends: 68 [2023-02-15 00:49:45,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 480 SyntacticMatches, 32 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7446 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1564, Invalid=24196, Unknown=0, NotChecked=0, Total=25760 [2023-02-15 00:49:45,935 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 327 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 3241 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 3405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 3241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 00:49:45,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 1382 Invalid, 3405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 3241 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 00:49:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-15 00:49:45,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-02-15 00:49:45,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2023-02-15 00:49:45,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2023-02-15 00:49:45,939 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 244 [2023-02-15 00:49:45,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:49:45,939 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2023-02-15 00:49:45,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 116 states have (on average 1.3793103448275863) internal successors, (160), 66 states have internal predecessors, (160), 23 states have call successors, (23), 1 states have call predecessors, (23), 35 states have return successors, (55), 54 states have call predecessors, (55), 23 states have call successors, (55) [2023-02-15 00:49:45,940 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2023-02-15 00:49:45,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-02-15 00:49:45,941 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:49:45,941 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 34, 34, 34, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:49:45,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 00:49:46,147 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 00:49:46,147 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:49:46,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:49:46,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1594510402, now seen corresponding path program 18 times [2023-02-15 00:49:46,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:49:46,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665748633] [2023-02-15 00:49:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:49:46,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:49:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:47,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:49:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:47,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:47,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:48,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:48,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:48,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:48,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:49,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:49,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:49,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:49,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:49,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:49,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:50,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:50,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:50,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:50,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:50,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:50,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-02-15 00:49:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:50,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:51,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:51,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:51,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:52,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:52,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:52,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:52,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:52,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:52,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:52,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:53,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:53,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:53,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:53,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:53,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:53,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:49:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:49:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4272 backedges. 130 proven. 1902 refuted. 0 times theorem prover too weak. 2240 trivial. 0 not checked. [2023-02-15 00:49:53,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:49:53,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665748633] [2023-02-15 00:49:53,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665748633] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:49:53,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553421822] [2023-02-15 00:49:53,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 00:49:53,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:49:53,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:49:53,240 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 00:49:53,241 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 00:49:53,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2023-02-15 00:49:53,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:49:53,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 432 conjunts are in the unsatisfiable core [2023-02-15 00:49:53,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:49:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4272 backedges. 70 proven. 1904 refuted. 0 times theorem prover too weak. 2298 trivial. 0 not checked. [2023-02-15 00:49:56,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:50:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4272 backedges. 59 proven. 3489 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2023-02-15 00:50:14,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553421822] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:50:14,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:50:14,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 48, 67] total 131 [2023-02-15 00:50:14,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727782026] [2023-02-15 00:50:14,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:50:14,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2023-02-15 00:50:14,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:50:14,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2023-02-15 00:50:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=523, Invalid=16507, Unknown=0, NotChecked=0, Total=17030 [2023-02-15 00:50:14,680 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 131 states, 126 states have (on average 1.4047619047619047) internal successors, (177), 74 states have internal predecessors, (177), 25 states have call successors, (25), 1 states have call predecessors, (25), 38 states have return successors, (60), 57 states have call predecessors, (60), 25 states have call successors, (60) [2023-02-15 00:50:17,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:50:17,636 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2023-02-15 00:50:17,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-15 00:50:17,636 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 126 states have (on average 1.4047619047619047) internal successors, (177), 74 states have internal predecessors, (177), 25 states have call successors, (25), 1 states have call predecessors, (25), 38 states have return successors, (60), 57 states have call predecessors, (60), 25 states have call successors, (60) Word has length 258 [2023-02-15 00:50:17,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:50:17,638 INFO L225 Difference]: With dead ends: 81 [2023-02-15 00:50:17,638 INFO L226 Difference]: Without dead ends: 71 [2023-02-15 00:50:17,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 483 SyntacticMatches, 54 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10232 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1869, Invalid=28233, Unknown=0, NotChecked=0, Total=30102 [2023-02-15 00:50:17,640 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 348 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 3190 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 3362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 3190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 00:50:17,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1581 Invalid, 3362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 3190 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 00:50:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-15 00:50:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-02-15 00:50:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2023-02-15 00:50:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2023-02-15 00:50:17,646 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 258 [2023-02-15 00:50:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:50:17,646 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2023-02-15 00:50:17,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 126 states have (on average 1.4047619047619047) internal successors, (177), 74 states have internal predecessors, (177), 25 states have call successors, (25), 1 states have call predecessors, (25), 38 states have return successors, (60), 57 states have call predecessors, (60), 25 states have call successors, (60) [2023-02-15 00:50:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2023-02-15 00:50:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-02-15 00:50:17,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:50:17,649 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 38, 36, 36, 36, 36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:50:17,657 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 00:50:17,849 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 00:50:17,850 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:50:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:50:17,850 INFO L85 PathProgramCache]: Analyzing trace with hash -623426708, now seen corresponding path program 19 times [2023-02-15 00:50:17,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:50:17,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508480582] [2023-02-15 00:50:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:50:17,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:50:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:18,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 00:50:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:19,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:19,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:20,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:20,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:20,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:21,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:21,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:21,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:21,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:21,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:22,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:22,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:22,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:22,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:22,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:22,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:22,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:22,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:23,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-02-15 00:50:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:23,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:23,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:24,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:24,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:24,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:25,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:25,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:25,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:25,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:25,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:25,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:25,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:26,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:26,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:26,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:26,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:26,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:26,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 00:50:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4775 backedges. 138 proven. 2122 refuted. 0 times theorem prover too weak. 2515 trivial. 0 not checked. [2023-02-15 00:50:26,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:50:26,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508480582] [2023-02-15 00:50:26,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508480582] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:50:26,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116094818] [2023-02-15 00:50:26,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 00:50:26,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:50:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:50:26,242 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 00:50:26,243 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 00:50:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:50:26,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 457 conjunts are in the unsatisfiable core [2023-02-15 00:50:26,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:50:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4775 backedges. 18 proven. 2106 refuted. 0 times theorem prover too weak. 2651 trivial. 0 not checked. [2023-02-15 00:50:29,351 INFO L328 TraceCheckSpWp]: Computing backward predicates...