./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/seq-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/loop-invgen/seq-3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 00:18:50,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 00:18:50,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 00:18:50,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 00:18:50,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 00:18:50,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 00:18:50,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 00:18:50,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 00:18:50,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 00:18:50,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 00:18:50,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 00:18:50,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 00:18:50,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 00:18:50,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 00:18:50,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 00:18:50,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 00:18:50,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 00:18:50,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 00:18:50,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 00:18:50,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 00:18:50,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 00:18:50,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 00:18:50,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 00:18:50,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 00:18:50,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 00:18:50,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 00:18:50,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 00:18:50,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 00:18:50,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 00:18:50,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 00:18:50,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 00:18:50,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 00:18:50,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 00:18:50,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 00:18:50,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 00:18:50,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 00:18:50,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 00:18:50,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 00:18:50,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 00:18:50,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 00:18:50,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 00:18:50,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 00:18:50,099 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 00:18:50,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 00:18:50,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 00:18:50,100 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 00:18:50,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 00:18:50,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 00:18:50,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 00:18:50,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 00:18:50,102 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 00:18:50,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 00:18:50,102 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 00:18:50,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 00:18:50,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 00:18:50,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 00:18:50,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 00:18:50,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 00:18:50,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 00:18:50,103 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 00:18:50,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 00:18:50,104 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 00:18:50,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 00:18:50,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 00:18:50,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 00:18:50,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 00:18:50,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:18:50,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 00:18:50,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 00:18:50,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 00:18:50,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 00:18:50,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 00:18:50,105 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 00:18:50,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 00:18:50,106 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 00:18:50,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 00:18:50,106 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 00:18:50,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 [2023-02-18 00:18:50,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 00:18:50,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 00:18:50,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 00:18:50,290 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 00:18:50,291 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 00:18:50,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/seq-3.i [2023-02-18 00:18:51,193 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 00:18:51,345 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 00:18:51,346 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/seq-3.i [2023-02-18 00:18:51,349 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1328ee13/fdad8aa4da95494b9e6dcbb54e9e213d/FLAG246701646 [2023-02-18 00:18:51,358 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1328ee13/fdad8aa4da95494b9e6dcbb54e9e213d [2023-02-18 00:18:51,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 00:18:51,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 00:18:51,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 00:18:51,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 00:18:51,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 00:18:51,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:18:51" (1/1) ... [2023-02-18 00:18:51,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a927a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51, skipping insertion in model container [2023-02-18 00:18:51,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:18:51" (1/1) ... [2023-02-18 00:18:51,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 00:18:51,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 00:18:51,469 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/loop-invgen/seq-3.i[893,906] [2023-02-18 00:18:51,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:18:51,485 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 00:18:51,492 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/loop-invgen/seq-3.i[893,906] [2023-02-18 00:18:51,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:18:51,503 INFO L208 MainTranslator]: Completed translation [2023-02-18 00:18:51,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51 WrapperNode [2023-02-18 00:18:51,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 00:18:51,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 00:18:51,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 00:18:51,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 00:18:51,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51" (1/1) ... [2023-02-18 00:18:51,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51" (1/1) ... [2023-02-18 00:18:51,522 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-02-18 00:18:51,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 00:18:51,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 00:18:51,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 00:18:51,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 00:18:51,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51" (1/1) ... [2023-02-18 00:18:51,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51" (1/1) ... [2023-02-18 00:18:51,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51" (1/1) ... [2023-02-18 00:18:51,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51" (1/1) ... [2023-02-18 00:18:51,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51" (1/1) ... [2023-02-18 00:18:51,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51" (1/1) ... [2023-02-18 00:18:51,549 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51" (1/1) ... [2023-02-18 00:18:51,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51" (1/1) ... [2023-02-18 00:18:51,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 00:18:51,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 00:18:51,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 00:18:51,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 00:18:51,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51" (1/1) ... [2023-02-18 00:18:51,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:18:51,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:51,571 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) [2023-02-18 00:18:51,572 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 [2023-02-18 00:18:51,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 00:18:51,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 00:18:51,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 00:18:51,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 00:18:51,640 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 00:18:51,644 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 00:18:51,782 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 00:18:51,786 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 00:18:51,789 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 00:18:51,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:18:51 BoogieIcfgContainer [2023-02-18 00:18:51,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 00:18:51,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 00:18:51,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 00:18:51,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 00:18:51,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 12:18:51" (1/3) ... [2023-02-18 00:18:51,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66060cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:18:51, skipping insertion in model container [2023-02-18 00:18:51,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:18:51" (2/3) ... [2023-02-18 00:18:51,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66060cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:18:51, skipping insertion in model container [2023-02-18 00:18:51,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:18:51" (3/3) ... [2023-02-18 00:18:51,803 INFO L112 eAbstractionObserver]: Analyzing ICFG seq-3.i [2023-02-18 00:18:51,814 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 00:18:51,814 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 00:18:51,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 00:18:51,875 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;@5c75a240, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 00:18:51,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 00:18:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:51,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 00:18:51,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:51,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:51,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:51,890 INFO L85 PathProgramCache]: Analyzing trace with hash -163175075, now seen corresponding path program 1 times [2023-02-18 00:18:51,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:51,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574334151] [2023-02-18 00:18:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:51,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:52,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:52,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574334151] [2023-02-18 00:18:52,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574334151] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:18:52,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:18:52,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 00:18:52,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045996872] [2023-02-18 00:18:52,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:18:52,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 00:18:52,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:52,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 00:18:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 00:18:52,133 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:52,214 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2023-02-18 00:18:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 00:18:52,216 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 00:18:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:52,221 INFO L225 Difference]: With dead ends: 48 [2023-02-18 00:18:52,221 INFO L226 Difference]: Without dead ends: 23 [2023-02-18 00:18:52,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-18 00:18:52,225 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:52,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 60 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:18:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-18 00:18:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2023-02-18 00:18:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-02-18 00:18:52,245 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2023-02-18 00:18:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:52,245 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-02-18 00:18:52,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-02-18 00:18:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 00:18:52,246 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:52,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:52,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 00:18:52,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:52,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:52,247 INFO L85 PathProgramCache]: Analyzing trace with hash -712013865, now seen corresponding path program 1 times [2023-02-18 00:18:52,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:52,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856383036] [2023-02-18 00:18:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:52,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:52,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:52,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856383036] [2023-02-18 00:18:52,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856383036] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:52,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133238153] [2023-02-18 00:18:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:52,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:52,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:52,364 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) [2023-02-18 00:18:52,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 00:18:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:52,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 00:18:52,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:52,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 00:18:52,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133238153] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:18:52,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 00:18:52,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-02-18 00:18:52,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215077365] [2023-02-18 00:18:52,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:18:52,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 00:18:52,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:52,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 00:18:52,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 00:18:52,463 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:52,490 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-02-18 00:18:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 00:18:52,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 00:18:52,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:52,491 INFO L225 Difference]: With dead ends: 26 [2023-02-18 00:18:52,491 INFO L226 Difference]: Without dead ends: 24 [2023-02-18 00:18:52,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:18:52,493 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:52,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:18:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-18 00:18:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2023-02-18 00:18:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-02-18 00:18:52,501 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2023-02-18 00:18:52,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:52,501 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-02-18 00:18:52,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:52,502 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-02-18 00:18:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 00:18:52,503 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:52,503 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:52,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 00:18:52,709 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 [2023-02-18 00:18:52,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:52,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1243265849, now seen corresponding path program 1 times [2023-02-18 00:18:52,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:52,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957146925] [2023-02-18 00:18:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:52,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:52,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:52,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957146925] [2023-02-18 00:18:52,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957146925] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:52,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579529304] [2023-02-18 00:18:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:52,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:52,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:52,804 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) [2023-02-18 00:18:52,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 00:18:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:52,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 00:18:52,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:52,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:52,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579529304] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:52,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:52,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-18 00:18:52,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770434660] [2023-02-18 00:18:52,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:52,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 00:18:52,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:52,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 00:18:52,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-02-18 00:18:52,993 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:53,084 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-02-18 00:18:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 00:18:53,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 00:18:53,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:53,086 INFO L225 Difference]: With dead ends: 38 [2023-02-18 00:18:53,087 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 00:18:53,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2023-02-18 00:18:53,089 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:53,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 100 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:18:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 00:18:53,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2023-02-18 00:18:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-02-18 00:18:53,097 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2023-02-18 00:18:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:53,098 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-02-18 00:18:53,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:53,098 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-02-18 00:18:53,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 00:18:53,099 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:53,099 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:53,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 00:18:53,304 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,SelfDestructingSolverStorable2 [2023-02-18 00:18:53,305 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:53,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:53,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2084334856, now seen corresponding path program 1 times [2023-02-18 00:18:53,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:53,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568906175] [2023-02-18 00:18:53,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:53,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:53,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:53,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568906175] [2023-02-18 00:18:53,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568906175] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:53,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708179778] [2023-02-18 00:18:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:53,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:53,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:53,371 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) [2023-02-18 00:18:53,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 00:18:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:53,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 00:18:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:53,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:53,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708179778] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:53,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:53,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-18 00:18:53,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978166907] [2023-02-18 00:18:53,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:53,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 00:18:53,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:53,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 00:18:53,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-02-18 00:18:53,487 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:53,538 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2023-02-18 00:18:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 00:18:53,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 00:18:53,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:53,539 INFO L225 Difference]: With dead ends: 50 [2023-02-18 00:18:53,539 INFO L226 Difference]: Without dead ends: 40 [2023-02-18 00:18:53,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2023-02-18 00:18:53,540 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:53,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 60 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:18:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-18 00:18:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 21. [2023-02-18 00:18:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-18 00:18:53,543 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2023-02-18 00:18:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:53,544 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-18 00:18:53,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-18 00:18:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 00:18:53,544 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:53,548 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:53,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 00:18:53,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:53,755 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:53,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:53,756 INFO L85 PathProgramCache]: Analyzing trace with hash -929410893, now seen corresponding path program 2 times [2023-02-18 00:18:53,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:53,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100424180] [2023-02-18 00:18:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:53,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:53,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:53,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100424180] [2023-02-18 00:18:53,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100424180] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:53,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343512226] [2023-02-18 00:18:53,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:18:53,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:53,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:53,832 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) [2023-02-18 00:18:53,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 00:18:53,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:18:53,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:18:53,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 00:18:53,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:53,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:53,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343512226] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:53,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:53,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2023-02-18 00:18:53,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805750085] [2023-02-18 00:18:53,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:53,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 00:18:53,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:53,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 00:18:53,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:18:53,907 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:53,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:53,949 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-02-18 00:18:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 00:18:53,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 00:18:53,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:53,950 INFO L225 Difference]: With dead ends: 32 [2023-02-18 00:18:53,950 INFO L226 Difference]: Without dead ends: 30 [2023-02-18 00:18:53,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:18:53,951 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:53,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 58 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:18:53,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-18 00:18:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2023-02-18 00:18:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:53,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-18 00:18:53,954 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2023-02-18 00:18:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:53,955 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-18 00:18:53,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-18 00:18:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 00:18:53,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:53,955 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:53,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 00:18:54,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:54,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:54,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:54,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1579087069, now seen corresponding path program 3 times [2023-02-18 00:18:54,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:54,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919345645] [2023-02-18 00:18:54,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:54,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:54,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:54,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919345645] [2023-02-18 00:18:54,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919345645] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:54,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238092053] [2023-02-18 00:18:54,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:18:54,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:54,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:54,256 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) [2023-02-18 00:18:54,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 00:18:54,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 00:18:54,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:18:54,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 00:18:54,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:54,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:54,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238092053] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:54,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:54,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-02-18 00:18:54,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410653059] [2023-02-18 00:18:54,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:54,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 00:18:54,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:54,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 00:18:54,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-02-18 00:18:54,466 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:54,543 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2023-02-18 00:18:54,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 00:18:54,544 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 00:18:54,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:54,544 INFO L225 Difference]: With dead ends: 51 [2023-02-18 00:18:54,544 INFO L226 Difference]: Without dead ends: 38 [2023-02-18 00:18:54,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2023-02-18 00:18:54,545 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:54,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 112 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:18:54,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-18 00:18:54,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2023-02-18 00:18:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-02-18 00:18:54,553 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2023-02-18 00:18:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:54,553 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-02-18 00:18:54,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:54,554 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-02-18 00:18:54,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 00:18:54,554 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:54,554 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:54,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 00:18:54,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:54,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:54,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:54,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1678234908, now seen corresponding path program 1 times [2023-02-18 00:18:54,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:54,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566443512] [2023-02-18 00:18:54,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:54,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:54,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:54,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566443512] [2023-02-18 00:18:54,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566443512] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:54,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056498230] [2023-02-18 00:18:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:54,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:54,819 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) [2023-02-18 00:18:54,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 00:18:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:54,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 00:18:54,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:54,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:54,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056498230] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:54,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:54,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-02-18 00:18:54,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623146212] [2023-02-18 00:18:54,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:54,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 00:18:54,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:54,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 00:18:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-02-18 00:18:54,967 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:55,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:55,076 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2023-02-18 00:18:55,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 00:18:55,077 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 00:18:55,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:55,079 INFO L225 Difference]: With dead ends: 64 [2023-02-18 00:18:55,079 INFO L226 Difference]: Without dead ends: 51 [2023-02-18 00:18:55,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2023-02-18 00:18:55,080 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:55,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 162 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:18:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-18 00:18:55,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 25. [2023-02-18 00:18:55,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-02-18 00:18:55,089 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2023-02-18 00:18:55,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:55,089 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-02-18 00:18:55,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-02-18 00:18:55,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 00:18:55,090 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:55,090 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:55,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 00:18:55,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:55,297 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:55,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:55,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1265791229, now seen corresponding path program 2 times [2023-02-18 00:18:55,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:55,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493638698] [2023-02-18 00:18:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:55,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:55,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:55,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493638698] [2023-02-18 00:18:55,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493638698] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:55,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102425432] [2023-02-18 00:18:55,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:18:55,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:55,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:55,353 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) [2023-02-18 00:18:55,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 00:18:55,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:18:55,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:18:55,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 00:18:55,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:55,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:55,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102425432] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:55,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:55,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-02-18 00:18:55,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642320516] [2023-02-18 00:18:55,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:55,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 00:18:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 00:18:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-02-18 00:18:55,490 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:55,574 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2023-02-18 00:18:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 00:18:55,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 00:18:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:55,575 INFO L225 Difference]: With dead ends: 79 [2023-02-18 00:18:55,575 INFO L226 Difference]: Without dead ends: 66 [2023-02-18 00:18:55,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2023-02-18 00:18:55,576 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:55,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 91 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:18:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-18 00:18:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 27. [2023-02-18 00:18:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-02-18 00:18:55,580 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2023-02-18 00:18:55,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:55,580 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-02-18 00:18:55,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:55,580 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-02-18 00:18:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 00:18:55,581 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:55,581 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:55,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 00:18:55,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:55,786 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:55,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1081918121, now seen corresponding path program 4 times [2023-02-18 00:18:55,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:55,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233453772] [2023-02-18 00:18:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:55,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:55,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:55,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233453772] [2023-02-18 00:18:55,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233453772] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:55,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794758706] [2023-02-18 00:18:55,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:18:55,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:55,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:55,835 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) [2023-02-18 00:18:55,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 00:18:55,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:18:55,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:18:55,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 00:18:55,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:55,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:55,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794758706] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:55,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:55,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2023-02-18 00:18:55,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096536679] [2023-02-18 00:18:55,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:55,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 00:18:55,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:55,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 00:18:55,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-18 00:18:55,907 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:55,953 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-02-18 00:18:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 00:18:55,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 00:18:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:55,953 INFO L225 Difference]: With dead ends: 38 [2023-02-18 00:18:55,953 INFO L226 Difference]: Without dead ends: 36 [2023-02-18 00:18:55,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-02-18 00:18:55,954 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:55,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 81 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:18:55,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-18 00:18:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-02-18 00:18:55,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-02-18 00:18:55,958 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2023-02-18 00:18:55,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:55,958 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-02-18 00:18:55,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:55,959 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-02-18 00:18:55,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 00:18:55,959 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:55,959 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:55,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 00:18:56,164 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,SelfDestructingSolverStorable8 [2023-02-18 00:18:56,164 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:56,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:56,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1983310407, now seen corresponding path program 5 times [2023-02-18 00:18:56,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:56,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239095588] [2023-02-18 00:18:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:56,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:56,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:56,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239095588] [2023-02-18 00:18:56,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239095588] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:56,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80637904] [2023-02-18 00:18:56,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:18:56,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:56,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:56,238 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) [2023-02-18 00:18:56,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 00:18:56,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 00:18:56,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:18:56,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 00:18:56,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:56,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:56,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80637904] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:56,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:56,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-18 00:18:56,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109022057] [2023-02-18 00:18:56,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:56,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 00:18:56,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:56,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 00:18:56,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-02-18 00:18:56,408 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:56,499 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2023-02-18 00:18:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 00:18:56,499 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 00:18:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:56,500 INFO L225 Difference]: With dead ends: 64 [2023-02-18 00:18:56,500 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 00:18:56,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 00:18:56,501 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:56,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 147 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:18:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 00:18:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2023-02-18 00:18:56,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-02-18 00:18:56,508 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2023-02-18 00:18:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:56,509 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-02-18 00:18:56,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-02-18 00:18:56,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 00:18:56,509 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:56,510 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:56,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 00:18:56,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 00:18:56,714 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:56,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:56,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1279672712, now seen corresponding path program 2 times [2023-02-18 00:18:56,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:56,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801369496] [2023-02-18 00:18:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:56,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:56,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:56,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801369496] [2023-02-18 00:18:56,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801369496] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:56,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469807434] [2023-02-18 00:18:56,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:18:56,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:56,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:56,797 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) [2023-02-18 00:18:56,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 00:18:56,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:18:56,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:18:56,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 00:18:56,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:56,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:56,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469807434] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:56,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:56,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-02-18 00:18:56,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914438997] [2023-02-18 00:18:56,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:56,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 00:18:56,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:56,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 00:18:56,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-02-18 00:18:56,956 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:57,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:57,081 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2023-02-18 00:18:57,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 00:18:57,081 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 00:18:57,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:57,082 INFO L225 Difference]: With dead ends: 81 [2023-02-18 00:18:57,082 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 00:18:57,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 00:18:57,083 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:57,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 168 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:18:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 00:18:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 31. [2023-02-18 00:18:57,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-02-18 00:18:57,093 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2023-02-18 00:18:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:57,093 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-02-18 00:18:57,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-02-18 00:18:57,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 00:18:57,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:57,094 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:57,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 00:18:57,294 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,SelfDestructingSolverStorable10 [2023-02-18 00:18:57,295 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:57,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:57,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1791066585, now seen corresponding path program 3 times [2023-02-18 00:18:57,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:57,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360751829] [2023-02-18 00:18:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:57,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:57,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:57,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360751829] [2023-02-18 00:18:57,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360751829] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:57,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711806865] [2023-02-18 00:18:57,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:18:57,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:57,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:57,370 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) [2023-02-18 00:18:57,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 00:18:57,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 00:18:57,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:18:57,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 00:18:57,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:57,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:57,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711806865] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:57,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:57,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-02-18 00:18:57,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650421939] [2023-02-18 00:18:57,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:57,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 00:18:57,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:57,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 00:18:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-02-18 00:18:57,524 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:57,665 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2023-02-18 00:18:57,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 00:18:57,666 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 00:18:57,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:57,666 INFO L225 Difference]: With dead ends: 97 [2023-02-18 00:18:57,666 INFO L226 Difference]: Without dead ends: 81 [2023-02-18 00:18:57,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 00:18:57,667 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 112 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:57,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 126 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:18:57,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-18 00:18:57,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 31. [2023-02-18 00:18:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-02-18 00:18:57,671 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2023-02-18 00:18:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:57,671 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-02-18 00:18:57,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-02-18 00:18:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 00:18:57,672 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:57,672 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:57,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 00:18:57,876 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,SelfDestructingSolverStorable11 [2023-02-18 00:18:57,877 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:57,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1712107944, now seen corresponding path program 3 times [2023-02-18 00:18:57,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:57,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710240340] [2023-02-18 00:18:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:57,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:57,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:57,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710240340] [2023-02-18 00:18:57,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710240340] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:57,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590843885] [2023-02-18 00:18:57,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:18:57,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:57,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:57,946 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) [2023-02-18 00:18:57,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 00:18:57,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 00:18:57,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:18:57,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 00:18:57,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:58,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:58,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590843885] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:58,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:58,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2023-02-18 00:18:58,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81500782] [2023-02-18 00:18:58,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:58,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 00:18:58,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:58,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 00:18:58,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-02-18 00:18:58,099 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:58,202 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2023-02-18 00:18:58,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 00:18:58,202 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 00:18:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:58,204 INFO L225 Difference]: With dead ends: 115 [2023-02-18 00:18:58,204 INFO L226 Difference]: Without dead ends: 99 [2023-02-18 00:18:58,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=933, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 00:18:58,206 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 104 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:58,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 112 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:18:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-18 00:18:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 33. [2023-02-18 00:18:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-02-18 00:18:58,210 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2023-02-18 00:18:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:58,211 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-02-18 00:18:58,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-02-18 00:18:58,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 00:18:58,212 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:58,212 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:58,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 00:18:58,415 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,SelfDestructingSolverStorable12 [2023-02-18 00:18:58,416 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:58,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:58,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1769959117, now seen corresponding path program 6 times [2023-02-18 00:18:58,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:58,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610608461] [2023-02-18 00:18:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:58,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:58,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:58,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610608461] [2023-02-18 00:18:58,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610608461] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:58,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283538878] [2023-02-18 00:18:58,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:18:58,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:58,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:58,473 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) [2023-02-18 00:18:58,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 00:18:58,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 00:18:58,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:18:58,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:18:58,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:58,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:58,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283538878] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:58,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:58,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2023-02-18 00:18:58,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325965998] [2023-02-18 00:18:58,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:58,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 00:18:58,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 00:18:58,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-02-18 00:18:58,573 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:58,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:58,627 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-02-18 00:18:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 00:18:58,627 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 00:18:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:58,628 INFO L225 Difference]: With dead ends: 44 [2023-02-18 00:18:58,628 INFO L226 Difference]: Without dead ends: 42 [2023-02-18 00:18:58,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 14 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2023-02-18 00:18:58,628 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:58,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:18:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-18 00:18:58,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2023-02-18 00:18:58,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-02-18 00:18:58,638 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2023-02-18 00:18:58,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:58,638 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-02-18 00:18:58,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:58,638 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-02-18 00:18:58,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 00:18:58,639 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:58,639 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:58,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 00:18:58,847 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,SelfDestructingSolverStorable13 [2023-02-18 00:18:58,847 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:58,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:58,847 INFO L85 PathProgramCache]: Analyzing trace with hash 466281565, now seen corresponding path program 7 times [2023-02-18 00:18:58,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:58,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037622396] [2023-02-18 00:18:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:58,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:58,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:58,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037622396] [2023-02-18 00:18:58,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037622396] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:58,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425281517] [2023-02-18 00:18:58,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:18:58,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:58,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:58,925 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) [2023-02-18 00:18:58,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 00:18:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:58,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:18:58,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:59,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:59,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425281517] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:59,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:59,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-02-18 00:18:59,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758685759] [2023-02-18 00:18:59,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:59,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 00:18:59,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 00:18:59,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2023-02-18 00:18:59,149 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:59,258 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2023-02-18 00:18:59,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 00:18:59,258 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 00:18:59,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:59,259 INFO L225 Difference]: With dead ends: 77 [2023-02-18 00:18:59,259 INFO L226 Difference]: Without dead ends: 58 [2023-02-18 00:18:59,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=345, Invalid=1295, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 00:18:59,262 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:59,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 105 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:18:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-18 00:18:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2023-02-18 00:18:59,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-02-18 00:18:59,268 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2023-02-18 00:18:59,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:59,268 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-02-18 00:18:59,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:59,268 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-02-18 00:18:59,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 00:18:59,272 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:59,272 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:59,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 00:18:59,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:59,477 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:18:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:18:59,478 INFO L85 PathProgramCache]: Analyzing trace with hash 397088156, now seen corresponding path program 4 times [2023-02-18 00:18:59,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:18:59,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938384204] [2023-02-18 00:18:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:18:59,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:18:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:18:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:59,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:18:59,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938384204] [2023-02-18 00:18:59,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938384204] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:18:59,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466807164] [2023-02-18 00:18:59,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:18:59,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:18:59,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:18:59,584 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) [2023-02-18 00:18:59,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 00:18:59,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:18:59,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:18:59,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:18:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:18:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:59,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:18:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:18:59,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466807164] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:18:59,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:18:59,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2023-02-18 00:18:59,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923266965] [2023-02-18 00:18:59,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:18:59,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 00:18:59,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:18:59,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 00:18:59,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2023-02-18 00:18:59,803 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:18:59,940 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2023-02-18 00:18:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 00:18:59,940 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 00:18:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:18:59,941 INFO L225 Difference]: With dead ends: 98 [2023-02-18 00:18:59,941 INFO L226 Difference]: Without dead ends: 79 [2023-02-18 00:18:59,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 00:18:59,942 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 73 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:18:59,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 157 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:18:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-18 00:18:59,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 37. [2023-02-18 00:18:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-02-18 00:18:59,947 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2023-02-18 00:18:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:18:59,947 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-02-18 00:18:59,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:18:59,947 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-02-18 00:18:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 00:18:59,948 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:18:59,948 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:18:59,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:00,151 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,SelfDestructingSolverStorable15 [2023-02-18 00:19:00,152 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:00,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1267711875, now seen corresponding path program 5 times [2023-02-18 00:19:00,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:00,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428691396] [2023-02-18 00:19:00,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:00,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:00,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:00,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428691396] [2023-02-18 00:19:00,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428691396] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:00,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882041217] [2023-02-18 00:19:00,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:00,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:00,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:00,231 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) [2023-02-18 00:19:00,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 00:19:00,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 00:19:00,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:00,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:19:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:00,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:00,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882041217] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:00,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:00,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2023-02-18 00:19:00,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542782435] [2023-02-18 00:19:00,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:00,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 00:19:00,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 00:19:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2023-02-18 00:19:00,424 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:00,569 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2023-02-18 00:19:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 00:19:00,570 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 00:19:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:00,570 INFO L225 Difference]: With dead ends: 118 [2023-02-18 00:19:00,570 INFO L226 Difference]: Without dead ends: 99 [2023-02-18 00:19:00,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 00:19:00,571 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:00,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 172 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-18 00:19:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 37. [2023-02-18 00:19:00,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-02-18 00:19:00,577 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2023-02-18 00:19:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:00,577 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-02-18 00:19:00,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:00,577 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-02-18 00:19:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 00:19:00,578 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:00,578 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:00,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:00,782 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,SelfDestructingSolverStorable16 [2023-02-18 00:19:00,782 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:00,782 INFO L85 PathProgramCache]: Analyzing trace with hash 618247548, now seen corresponding path program 6 times [2023-02-18 00:19:00,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:00,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073170464] [2023-02-18 00:19:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:00,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:00,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:00,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073170464] [2023-02-18 00:19:00,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073170464] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:00,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290868733] [2023-02-18 00:19:00,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:00,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:00,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:00,855 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) [2023-02-18 00:19:00,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 00:19:00,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 00:19:00,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:00,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:19:00,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:00,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:01,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290868733] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:01,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:01,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2023-02-18 00:19:01,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974487630] [2023-02-18 00:19:01,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:01,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 00:19:01,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:01,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 00:19:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2023-02-18 00:19:01,066 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:01,195 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2023-02-18 00:19:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 00:19:01,196 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 00:19:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:01,196 INFO L225 Difference]: With dead ends: 137 [2023-02-18 00:19:01,196 INFO L226 Difference]: Without dead ends: 118 [2023-02-18 00:19:01,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 14 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 00:19:01,197 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 129 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:01,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 137 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-18 00:19:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 37. [2023-02-18 00:19:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-02-18 00:19:01,203 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2023-02-18 00:19:01,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:01,203 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-02-18 00:19:01,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:01,203 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-02-18 00:19:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 00:19:01,204 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:01,204 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:01,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:01,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 00:19:01,408 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:01,409 INFO L85 PathProgramCache]: Analyzing trace with hash 956179613, now seen corresponding path program 4 times [2023-02-18 00:19:01,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:01,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723968776] [2023-02-18 00:19:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:01,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:01,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:01,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723968776] [2023-02-18 00:19:01,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723968776] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:01,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332404786] [2023-02-18 00:19:01,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:01,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:01,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:01,482 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) [2023-02-18 00:19:01,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 00:19:01,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:01,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:01,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:19:01,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:01,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:01,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332404786] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:01,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:01,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2023-02-18 00:19:01,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011485764] [2023-02-18 00:19:01,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:01,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 00:19:01,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:01,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 00:19:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-02-18 00:19:01,658 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:01,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:01,809 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2023-02-18 00:19:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 00:19:01,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 00:19:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:01,810 INFO L225 Difference]: With dead ends: 158 [2023-02-18 00:19:01,810 INFO L226 Difference]: Without dead ends: 139 [2023-02-18 00:19:01,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 15 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 00:19:01,812 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 165 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:01,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 120 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-18 00:19:01,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 39. [2023-02-18 00:19:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-02-18 00:19:01,819 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2023-02-18 00:19:01,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:01,819 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-02-18 00:19:01,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:01,819 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-02-18 00:19:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 00:19:01,819 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:01,820 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:01,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:02,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:02,023 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:02,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1056697641, now seen corresponding path program 8 times [2023-02-18 00:19:02,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:02,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231754405] [2023-02-18 00:19:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:02,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:02,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:02,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231754405] [2023-02-18 00:19:02,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231754405] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:02,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485062851] [2023-02-18 00:19:02,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:02,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:02,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:02,082 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) [2023-02-18 00:19:02,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 00:19:02,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:02,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:02,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 00:19:02,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:02,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:02,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485062851] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:02,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:02,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2023-02-18 00:19:02,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369730025] [2023-02-18 00:19:02,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:02,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 00:19:02,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:02,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 00:19:02,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-02-18 00:19:02,188 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:02,254 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2023-02-18 00:19:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 00:19:02,254 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-18 00:19:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:02,254 INFO L225 Difference]: With dead ends: 50 [2023-02-18 00:19:02,254 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 00:19:02,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 18 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2023-02-18 00:19:02,256 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:02,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 91 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 00:19:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2023-02-18 00:19:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-02-18 00:19:02,265 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 28 [2023-02-18 00:19:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:02,266 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-02-18 00:19:02,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-02-18 00:19:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 00:19:02,266 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:02,266 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:02,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:02,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:02,470 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:02,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2035699769, now seen corresponding path program 9 times [2023-02-18 00:19:02,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:02,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230494784] [2023-02-18 00:19:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:02,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:02,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:02,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230494784] [2023-02-18 00:19:02,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230494784] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:02,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792343969] [2023-02-18 00:19:02,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:02,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:02,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:02,583 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) [2023-02-18 00:19:02,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 00:19:02,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 00:19:02,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:02,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 00:19:02,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:02,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:02,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792343969] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:02,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:02,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-18 00:19:02,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468078455] [2023-02-18 00:19:02,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:02,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 00:19:02,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:02,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 00:19:02,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 00:19:02,852 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:02,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:02,989 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2023-02-18 00:19:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 00:19:02,989 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 00:19:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:02,990 INFO L225 Difference]: With dead ends: 90 [2023-02-18 00:19:02,990 INFO L226 Difference]: Without dead ends: 68 [2023-02-18 00:19:02,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=442, Invalid=1720, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 00:19:02,991 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:02,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 136 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:02,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-18 00:19:02,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2023-02-18 00:19:03,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-02-18 00:19:03,000 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2023-02-18 00:19:03,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:03,000 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-02-18 00:19:03,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-02-18 00:19:03,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 00:19:03,001 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:03,001 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:03,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:03,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-18 00:19:03,209 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:03,210 INFO L85 PathProgramCache]: Analyzing trace with hash 992856568, now seen corresponding path program 7 times [2023-02-18 00:19:03,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:03,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742399237] [2023-02-18 00:19:03,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:03,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:03,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:03,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742399237] [2023-02-18 00:19:03,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742399237] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:03,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198499147] [2023-02-18 00:19:03,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:03,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:03,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:03,317 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:03,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 00:19:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:03,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 00:19:03,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:03,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:03,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198499147] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:03,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:03,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2023-02-18 00:19:03,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709519155] [2023-02-18 00:19:03,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:03,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 00:19:03,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:03,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 00:19:03,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2023-02-18 00:19:03,575 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:03,755 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2023-02-18 00:19:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 00:19:03,755 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 00:19:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:03,755 INFO L225 Difference]: With dead ends: 115 [2023-02-18 00:19:03,756 INFO L226 Difference]: Without dead ends: 93 [2023-02-18 00:19:03,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 14 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=490, Invalid=2060, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 00:19:03,757 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:03,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 150 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-18 00:19:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 43. [2023-02-18 00:19:03,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-02-18 00:19:03,768 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2023-02-18 00:19:03,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:03,768 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-02-18 00:19:03,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-02-18 00:19:03,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 00:19:03,769 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:03,769 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:03,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-18 00:19:03,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-18 00:19:03,969 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:03,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1236311129, now seen corresponding path program 8 times [2023-02-18 00:19:03,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:03,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562888449] [2023-02-18 00:19:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:03,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:04,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:04,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562888449] [2023-02-18 00:19:04,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562888449] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:04,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581858424] [2023-02-18 00:19:04,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:04,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:04,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:04,062 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:04,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 00:19:04,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:04,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:04,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 00:19:04,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:04,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:04,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581858424] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:04,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:04,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2023-02-18 00:19:04,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112120544] [2023-02-18 00:19:04,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:04,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 00:19:04,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:04,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 00:19:04,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2023-02-18 00:19:04,294 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:04,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:04,529 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2023-02-18 00:19:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 00:19:04,529 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 00:19:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:04,530 INFO L225 Difference]: With dead ends: 139 [2023-02-18 00:19:04,530 INFO L226 Difference]: Without dead ends: 117 [2023-02-18 00:19:04,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=520, Invalid=2236, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 00:19:04,531 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 110 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:04,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 232 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:04,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-18 00:19:04,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 43. [2023-02-18 00:19:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:04,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-02-18 00:19:04,548 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2023-02-18 00:19:04,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:04,548 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-02-18 00:19:04,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-02-18 00:19:04,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 00:19:04,549 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:04,549 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:04,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:04,753 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash -834045480, now seen corresponding path program 9 times [2023-02-18 00:19:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:04,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635620412] [2023-02-18 00:19:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:04,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:04,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635620412] [2023-02-18 00:19:04,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635620412] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:04,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84237052] [2023-02-18 00:19:04,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:04,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:04,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:04,842 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:04,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 00:19:04,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 00:19:04,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:04,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 00:19:04,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:04,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:05,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84237052] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:05,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:05,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2023-02-18 00:19:05,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515975771] [2023-02-18 00:19:05,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:05,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 00:19:05,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:05,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 00:19:05,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2023-02-18 00:19:05,080 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:05,288 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2023-02-18 00:19:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 00:19:05,289 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 00:19:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:05,289 INFO L225 Difference]: With dead ends: 162 [2023-02-18 00:19:05,289 INFO L226 Difference]: Without dead ends: 140 [2023-02-18 00:19:05,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 33 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=519, Invalid=2237, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 00:19:05,290 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 122 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:05,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 168 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:05,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-18 00:19:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 43. [2023-02-18 00:19:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:05,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-02-18 00:19:05,300 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2023-02-18 00:19:05,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:05,300 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-02-18 00:19:05,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:05,301 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-02-18 00:19:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 00:19:05,301 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:05,301 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:05,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:05,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:05,506 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:05,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:05,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1315926137, now seen corresponding path program 10 times [2023-02-18 00:19:05,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:05,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147479888] [2023-02-18 00:19:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:05,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:05,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:05,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147479888] [2023-02-18 00:19:05,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147479888] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:05,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238982093] [2023-02-18 00:19:05,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:05,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:05,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:05,602 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:05,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 00:19:05,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:05,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:05,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 00:19:05,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:05,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:05,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238982093] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:05,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:05,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2023-02-18 00:19:05,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11756472] [2023-02-18 00:19:05,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:05,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 00:19:05,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:05,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 00:19:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2023-02-18 00:19:05,874 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:06,104 INFO L93 Difference]: Finished difference Result 184 states and 197 transitions. [2023-02-18 00:19:06,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 00:19:06,104 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 00:19:06,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:06,105 INFO L225 Difference]: With dead ends: 184 [2023-02-18 00:19:06,105 INFO L226 Difference]: Without dead ends: 162 [2023-02-18 00:19:06,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 17 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=487, Invalid=2063, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 00:19:06,106 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:06,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 184 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:06,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-18 00:19:06,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 43. [2023-02-18 00:19:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-02-18 00:19:06,117 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2023-02-18 00:19:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:06,117 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-02-18 00:19:06,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:06,117 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-02-18 00:19:06,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 00:19:06,117 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:06,117 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:06,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-18 00:19:06,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-18 00:19:06,324 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:06,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1246732728, now seen corresponding path program 5 times [2023-02-18 00:19:06,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:06,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015034867] [2023-02-18 00:19:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:06,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:06,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:06,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015034867] [2023-02-18 00:19:06,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015034867] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:06,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876381498] [2023-02-18 00:19:06,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:06,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:06,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:06,410 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:06,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 00:19:06,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-18 00:19:06,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:06,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 00:19:06,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:06,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:06,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876381498] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:06,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:06,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2023-02-18 00:19:06,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024996883] [2023-02-18 00:19:06,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:06,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 00:19:06,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 00:19:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2023-02-18 00:19:06,649 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:06,841 INFO L93 Difference]: Finished difference Result 208 states and 223 transitions. [2023-02-18 00:19:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 00:19:06,841 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 00:19:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:06,842 INFO L225 Difference]: With dead ends: 208 [2023-02-18 00:19:06,842 INFO L226 Difference]: Without dead ends: 186 [2023-02-18 00:19:06,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 18 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 00:19:06,843 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 199 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:06,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 143 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:06,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-02-18 00:19:06,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 45. [2023-02-18 00:19:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:06,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-02-18 00:19:06,854 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 31 [2023-02-18 00:19:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:06,854 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-02-18 00:19:06,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:06,855 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-02-18 00:19:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 00:19:06,855 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:06,855 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:06,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-02-18 00:19:07,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-18 00:19:07,059 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:07,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:07,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1761587635, now seen corresponding path program 10 times [2023-02-18 00:19:07,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:07,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37163250] [2023-02-18 00:19:07,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:07,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:07,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:07,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37163250] [2023-02-18 00:19:07,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37163250] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:07,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104803180] [2023-02-18 00:19:07,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:07,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:07,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:07,132 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:07,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 00:19:07,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:07,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:07,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:19:07,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:07,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:07,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104803180] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:07,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:07,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 13 [2023-02-18 00:19:07,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341163894] [2023-02-18 00:19:07,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:07,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 00:19:07,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:07,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 00:19:07,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:19:07,258 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:07,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:07,344 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2023-02-18 00:19:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 00:19:07,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-18 00:19:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:07,344 INFO L225 Difference]: With dead ends: 56 [2023-02-18 00:19:07,345 INFO L226 Difference]: Without dead ends: 54 [2023-02-18 00:19:07,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 22 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2023-02-18 00:19:07,345 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:07,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 115 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-18 00:19:07,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-02-18 00:19:07,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-02-18 00:19:07,357 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 32 [2023-02-18 00:19:07,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:07,357 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-02-18 00:19:07,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-02-18 00:19:07,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 00:19:07,358 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:07,358 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:07,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:07,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 00:19:07,563 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:07,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:07,564 INFO L85 PathProgramCache]: Analyzing trace with hash -743312419, now seen corresponding path program 11 times [2023-02-18 00:19:07,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:07,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905363738] [2023-02-18 00:19:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:07,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:07,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:07,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905363738] [2023-02-18 00:19:07,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905363738] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:07,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560071884] [2023-02-18 00:19:07,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:07,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:07,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:07,692 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:07,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 00:19:07,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-18 00:19:07,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:07,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:19:07,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:07,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:07,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560071884] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:07,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:07,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2023-02-18 00:19:07,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611649954] [2023-02-18 00:19:07,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:07,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 00:19:07,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:07,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 00:19:07,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 00:19:07,983 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:08,154 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2023-02-18 00:19:08,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 00:19:08,155 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 00:19:08,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:08,155 INFO L225 Difference]: With dead ends: 103 [2023-02-18 00:19:08,155 INFO L226 Difference]: Without dead ends: 78 [2023-02-18 00:19:08,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=551, Invalid=2205, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 00:19:08,156 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:08,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 159 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:08,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-18 00:19:08,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2023-02-18 00:19:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-18 00:19:08,171 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2023-02-18 00:19:08,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:08,171 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-18 00:19:08,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-18 00:19:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 00:19:08,171 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:08,171 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:08,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:08,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-18 00:19:08,372 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:08,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:08,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2052557284, now seen corresponding path program 11 times [2023-02-18 00:19:08,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:08,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788342494] [2023-02-18 00:19:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:08,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:08,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:08,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788342494] [2023-02-18 00:19:08,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788342494] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:08,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723485185] [2023-02-18 00:19:08,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:08,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:08,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:08,498 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:08,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 00:19:08,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-18 00:19:08,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:08,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:19:08,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:08,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:08,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723485185] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:08,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:08,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2023-02-18 00:19:08,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115389684] [2023-02-18 00:19:08,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:08,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-18 00:19:08,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:08,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-18 00:19:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 00:19:08,795 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:09,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:09,048 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2023-02-18 00:19:09,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 00:19:09,049 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 00:19:09,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:09,049 INFO L225 Difference]: With dead ends: 132 [2023-02-18 00:19:09,049 INFO L226 Difference]: Without dead ends: 107 [2023-02-18 00:19:09,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 16 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=622, Invalid=2684, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 00:19:09,050 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:09,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 246 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:09,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-18 00:19:09,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 49. [2023-02-18 00:19:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-18 00:19:09,065 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2023-02-18 00:19:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:09,065 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-18 00:19:09,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-18 00:19:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 00:19:09,065 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:09,065 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:09,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-02-18 00:19:09,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-18 00:19:09,270 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:09,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:09,270 INFO L85 PathProgramCache]: Analyzing trace with hash 399060989, now seen corresponding path program 12 times [2023-02-18 00:19:09,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:09,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792734481] [2023-02-18 00:19:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:09,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:09,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:09,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792734481] [2023-02-18 00:19:09,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792734481] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:09,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492395902] [2023-02-18 00:19:09,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:09,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:09,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:09,373 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:09,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-18 00:19:09,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 00:19:09,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:09,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:19:09,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:09,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:09,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492395902] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:09,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:09,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2023-02-18 00:19:09,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016163485] [2023-02-18 00:19:09,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:09,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 00:19:09,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:09,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 00:19:09,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 00:19:09,658 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:09,905 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2023-02-18 00:19:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 00:19:09,906 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 00:19:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:09,906 INFO L225 Difference]: With dead ends: 160 [2023-02-18 00:19:09,906 INFO L226 Difference]: Without dead ends: 135 [2023-02-18 00:19:09,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 17 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=2985, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 00:19:09,907 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 138 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:09,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 174 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-18 00:19:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 49. [2023-02-18 00:19:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:09,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-18 00:19:09,926 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2023-02-18 00:19:09,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:09,926 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-18 00:19:09,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-18 00:19:09,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 00:19:09,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:09,926 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:09,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:10,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:10,131 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:10,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:10,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1045875204, now seen corresponding path program 13 times [2023-02-18 00:19:10,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:10,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315826731] [2023-02-18 00:19:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:10,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:10,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:10,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315826731] [2023-02-18 00:19:10,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315826731] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:10,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756883370] [2023-02-18 00:19:10,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:10,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:10,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:10,243 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:10,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-18 00:19:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:10,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:19:10,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:10,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:10,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756883370] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:10,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:10,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 34 [2023-02-18 00:19:10,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774924143] [2023-02-18 00:19:10,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:10,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 00:19:10,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:10,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 00:19:10,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 00:19:10,530 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:10,811 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2023-02-18 00:19:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 00:19:10,811 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 00:19:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:10,811 INFO L225 Difference]: With dead ends: 187 [2023-02-18 00:19:10,811 INFO L226 Difference]: Without dead ends: 162 [2023-02-18 00:19:10,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 18 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=693, Invalid=3089, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 00:19:10,812 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 147 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:10,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 206 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-18 00:19:10,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 49. [2023-02-18 00:19:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-18 00:19:10,829 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2023-02-18 00:19:10,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:10,829 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-18 00:19:10,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:10,829 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-18 00:19:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 00:19:10,829 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:10,829 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:10,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-02-18 00:19:11,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-02-18 00:19:11,034 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:11,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:11,034 INFO L85 PathProgramCache]: Analyzing trace with hash 985723933, now seen corresponding path program 14 times [2023-02-18 00:19:11,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:11,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352475344] [2023-02-18 00:19:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:11,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:11,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:11,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352475344] [2023-02-18 00:19:11,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352475344] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:11,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817896114] [2023-02-18 00:19:11,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:11,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:11,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:11,144 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:11,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-18 00:19:11,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:11,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:11,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:19:11,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:11,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:11,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817896114] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:11,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:11,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2023-02-18 00:19:11,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676574962] [2023-02-18 00:19:11,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:11,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 00:19:11,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:11,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 00:19:11,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 00:19:11,405 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:11,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:11,676 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2023-02-18 00:19:11,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 00:19:11,677 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 00:19:11,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:11,677 INFO L225 Difference]: With dead ends: 213 [2023-02-18 00:19:11,677 INFO L226 Difference]: Without dead ends: 188 [2023-02-18 00:19:11,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 19 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=673, Invalid=2987, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 00:19:11,678 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 188 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:11,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 182 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-02-18 00:19:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 49. [2023-02-18 00:19:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-18 00:19:11,695 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2023-02-18 00:19:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:11,695 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-18 00:19:11,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-18 00:19:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 00:19:11,696 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:11,696 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:11,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:11,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:11,896 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:11,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:11,896 INFO L85 PathProgramCache]: Analyzing trace with hash -57119268, now seen corresponding path program 15 times [2023-02-18 00:19:11,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:11,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132582676] [2023-02-18 00:19:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:11,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:12,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:12,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132582676] [2023-02-18 00:19:12,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132582676] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:12,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340831775] [2023-02-18 00:19:12,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:12,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:12,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:12,006 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:12,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-18 00:19:12,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-18 00:19:12,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:12,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:19:12,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:12,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:12,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340831775] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:12,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:12,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 32 [2023-02-18 00:19:12,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310524118] [2023-02-18 00:19:12,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:12,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 00:19:12,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 00:19:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2023-02-18 00:19:12,311 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:12,597 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2023-02-18 00:19:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 00:19:12,597 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 00:19:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:12,597 INFO L225 Difference]: With dead ends: 238 [2023-02-18 00:19:12,597 INFO L226 Difference]: Without dead ends: 213 [2023-02-18 00:19:12,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 20 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=618, Invalid=2688, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 00:19:12,598 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 187 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:12,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 188 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:12,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-02-18 00:19:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 49. [2023-02-18 00:19:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-18 00:19:12,616 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2023-02-18 00:19:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:12,616 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-18 00:19:12,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-18 00:19:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 00:19:12,616 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:12,616 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:12,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:12,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:12,817 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:12,817 INFO L85 PathProgramCache]: Analyzing trace with hash 186335293, now seen corresponding path program 6 times [2023-02-18 00:19:12,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:12,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188431509] [2023-02-18 00:19:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:12,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:12,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:12,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188431509] [2023-02-18 00:19:12,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188431509] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:12,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491228758] [2023-02-18 00:19:12,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:12,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:12,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:12,924 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:12,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-18 00:19:12,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 00:19:12,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:12,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:19:12,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:13,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:13,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491228758] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:13,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:13,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2023-02-18 00:19:13,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139079667] [2023-02-18 00:19:13,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:13,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 00:19:13,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:13,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 00:19:13,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2023-02-18 00:19:13,174 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:13,454 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2023-02-18 00:19:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 00:19:13,454 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 00:19:13,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:13,454 INFO L225 Difference]: With dead ends: 265 [2023-02-18 00:19:13,454 INFO L226 Difference]: Without dead ends: 240 [2023-02-18 00:19:13,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 21 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 00:19:13,455 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 216 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:13,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 165 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-02-18 00:19:13,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 51. [2023-02-18 00:19:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2023-02-18 00:19:13,474 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 35 [2023-02-18 00:19:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:13,474 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2023-02-18 00:19:13,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2023-02-18 00:19:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 00:19:13,474 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:13,474 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:13,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:13,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-02-18 00:19:13,676 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash 611977303, now seen corresponding path program 12 times [2023-02-18 00:19:13,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:13,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526502848] [2023-02-18 00:19:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:13,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:13,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:13,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526502848] [2023-02-18 00:19:13,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526502848] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:13,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815116130] [2023-02-18 00:19:13,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:13,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:13,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:13,740 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:13,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-18 00:19:13,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 00:19:13,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:13,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:19:13,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:13,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:13,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815116130] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:13,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:13,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 14 [2023-02-18 00:19:13,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063982576] [2023-02-18 00:19:13,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:13,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 00:19:13,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:13,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 00:19:13,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-02-18 00:19:13,899 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:14,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:14,001 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2023-02-18 00:19:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 00:19:14,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-18 00:19:14,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:14,002 INFO L225 Difference]: With dead ends: 62 [2023-02-18 00:19:14,002 INFO L226 Difference]: Without dead ends: 60 [2023-02-18 00:19:14,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 26 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2023-02-18 00:19:14,002 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:14,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 128 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:14,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-18 00:19:14,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2023-02-18 00:19:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2023-02-18 00:19:14,021 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 36 [2023-02-18 00:19:14,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:14,021 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2023-02-18 00:19:14,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2023-02-18 00:19:14,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 00:19:14,022 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:14,022 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:14,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:14,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-18 00:19:14,227 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:14,227 INFO L85 PathProgramCache]: Analyzing trace with hash -715494727, now seen corresponding path program 13 times [2023-02-18 00:19:14,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:14,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556055148] [2023-02-18 00:19:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:14,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:14,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:14,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556055148] [2023-02-18 00:19:14,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556055148] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:14,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909117487] [2023-02-18 00:19:14,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:14,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:14,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:14,348 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:14,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-18 00:19:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:19:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:14,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:14,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909117487] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:14,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:14,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2023-02-18 00:19:14,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68951061] [2023-02-18 00:19:14,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:14,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-18 00:19:14,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-18 00:19:14,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 00:19:14,715 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:14,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:14,946 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2023-02-18 00:19:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 00:19:14,946 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 00:19:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:14,947 INFO L225 Difference]: With dead ends: 116 [2023-02-18 00:19:14,947 INFO L226 Difference]: Without dead ends: 88 [2023-02-18 00:19:14,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=672, Invalid=2750, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 00:19:14,948 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:14,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 162 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:14,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-18 00:19:14,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2023-02-18 00:19:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:14,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-18 00:19:14,972 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-18 00:19:14,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:14,972 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-18 00:19:14,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:14,972 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-18 00:19:14,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 00:19:14,973 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:14,973 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:14,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:15,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-18 00:19:15,178 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:15,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:15,178 INFO L85 PathProgramCache]: Analyzing trace with hash -944261768, now seen corresponding path program 16 times [2023-02-18 00:19:15,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:15,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246625790] [2023-02-18 00:19:15,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:15,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:15,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:15,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246625790] [2023-02-18 00:19:15,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246625790] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:15,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355087823] [2023-02-18 00:19:15,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:15,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:15,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:15,313 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:15,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-18 00:19:15,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:15,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:15,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:19:15,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:15,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:15,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355087823] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:15,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:15,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2023-02-18 00:19:15,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975637762] [2023-02-18 00:19:15,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:15,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 00:19:15,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:15,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 00:19:15,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 00:19:15,668 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:15,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:15,947 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2023-02-18 00:19:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 00:19:15,947 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 00:19:15,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:15,948 INFO L225 Difference]: With dead ends: 149 [2023-02-18 00:19:15,948 INFO L226 Difference]: Without dead ends: 121 [2023-02-18 00:19:15,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 41 SyntacticMatches, 18 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=770, Invalid=3390, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 00:19:15,948 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:15,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 180 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:15,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-18 00:19:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 55. [2023-02-18 00:19:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-18 00:19:15,972 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-18 00:19:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:15,973 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-18 00:19:15,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-18 00:19:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 00:19:15,973 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:15,973 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:15,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:16,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:16,174 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:16,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:16,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2060020007, now seen corresponding path program 17 times [2023-02-18 00:19:16,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:16,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479837761] [2023-02-18 00:19:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:16,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:16,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:16,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479837761] [2023-02-18 00:19:16,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479837761] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:16,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566136762] [2023-02-18 00:19:16,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:16,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:16,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:16,305 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:16,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-18 00:19:16,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 00:19:16,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:16,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:19:16,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:16,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:16,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566136762] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:16,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:16,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 39 [2023-02-18 00:19:16,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791012346] [2023-02-18 00:19:16,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:16,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 00:19:16,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:16,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 00:19:16,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 00:19:16,630 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:16,998 INFO L93 Difference]: Finished difference Result 181 states and 194 transitions. [2023-02-18 00:19:16,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 00:19:16,998 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 00:19:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:16,999 INFO L225 Difference]: With dead ends: 181 [2023-02-18 00:19:16,999 INFO L226 Difference]: Without dead ends: 153 [2023-02-18 00:19:16,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 41 SyntacticMatches, 19 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1966 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=851, Invalid=3841, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 00:19:16,999 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 112 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:17,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 218 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-18 00:19:17,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 55. [2023-02-18 00:19:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-18 00:19:17,025 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-18 00:19:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:17,025 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-18 00:19:17,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-18 00:19:17,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 00:19:17,025 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:17,025 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:17,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:17,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-18 00:19:17,225 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:17,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1818917544, now seen corresponding path program 18 times [2023-02-18 00:19:17,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:17,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388082773] [2023-02-18 00:19:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:17,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:17,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:17,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388082773] [2023-02-18 00:19:17,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388082773] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:17,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100791328] [2023-02-18 00:19:17,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:17,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:17,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:17,349 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:17,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-18 00:19:17,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-02-18 00:19:17,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:17,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:19:17,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:17,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:17,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100791328] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:17,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:17,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 38 [2023-02-18 00:19:17,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98672868] [2023-02-18 00:19:17,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:17,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-18 00:19:17,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:17,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-18 00:19:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 00:19:17,694 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:18,048 INFO L93 Difference]: Finished difference Result 212 states and 226 transitions. [2023-02-18 00:19:18,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 00:19:18,049 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 00:19:18,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:18,050 INFO L225 Difference]: With dead ends: 212 [2023-02-18 00:19:18,051 INFO L226 Difference]: Without dead ends: 184 [2023-02-18 00:19:18,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 41 SyntacticMatches, 20 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=894, Invalid=4076, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 00:19:18,052 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 154 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:18,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 165 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:18,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-02-18 00:19:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 55. [2023-02-18 00:19:18,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-18 00:19:18,079 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-18 00:19:18,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:18,079 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-18 00:19:18,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:18,079 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-18 00:19:18,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 00:19:18,080 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:18,080 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:18,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:18,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-18 00:19:18,284 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:18,285 INFO L85 PathProgramCache]: Analyzing trace with hash 544164601, now seen corresponding path program 19 times [2023-02-18 00:19:18,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:18,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918263021] [2023-02-18 00:19:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:18,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:18,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:18,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918263021] [2023-02-18 00:19:18,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918263021] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:18,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123459101] [2023-02-18 00:19:18,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:18,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:18,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:18,452 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:18,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-18 00:19:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:18,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:19:18,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:18,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:18,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123459101] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:18,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:18,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2023-02-18 00:19:18,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361345283] [2023-02-18 00:19:18,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:18,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 00:19:18,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:18,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 00:19:18,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 00:19:18,808 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:19,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:19,244 INFO L93 Difference]: Finished difference Result 242 states and 257 transitions. [2023-02-18 00:19:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 00:19:19,244 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 00:19:19,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:19,245 INFO L225 Difference]: With dead ends: 242 [2023-02-18 00:19:19,245 INFO L226 Difference]: Without dead ends: 214 [2023-02-18 00:19:19,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 41 SyntacticMatches, 21 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=893, Invalid=4077, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 00:19:19,246 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 198 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:19,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 241 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-02-18 00:19:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 55. [2023-02-18 00:19:19,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-18 00:19:19,274 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-18 00:19:19,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:19,275 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-18 00:19:19,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:19,275 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-18 00:19:19,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 00:19:19,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:19,276 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:19,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:19,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-18 00:19:19,477 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash -765080264, now seen corresponding path program 20 times [2023-02-18 00:19:19,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:19,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330918252] [2023-02-18 00:19:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:19,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:19,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:19,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330918252] [2023-02-18 00:19:19,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330918252] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:19,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845331288] [2023-02-18 00:19:19,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:19,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:19,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:19,600 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:19,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-18 00:19:19,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:19,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:19,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:19:19,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:19,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:19,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845331288] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:19,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:19,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 36 [2023-02-18 00:19:19,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533545616] [2023-02-18 00:19:19,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:19,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-18 00:19:19,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:19,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-18 00:19:19,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 00:19:19,900 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:20,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:20,338 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2023-02-18 00:19:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 00:19:20,339 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 00:19:20,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:20,339 INFO L225 Difference]: With dead ends: 271 [2023-02-18 00:19:20,339 INFO L226 Difference]: Without dead ends: 243 [2023-02-18 00:19:20,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 41 SyntacticMatches, 22 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=848, Invalid=3844, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 00:19:20,340 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 210 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:20,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 240 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-02-18 00:19:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 55. [2023-02-18 00:19:20,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-18 00:19:20,368 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-18 00:19:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:20,369 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-18 00:19:20,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-18 00:19:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 00:19:20,369 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:20,369 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:20,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:20,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-02-18 00:19:20,574 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:20,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1686538009, now seen corresponding path program 21 times [2023-02-18 00:19:20,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:20,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378543188] [2023-02-18 00:19:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:20,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:20,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378543188] [2023-02-18 00:19:20,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378543188] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064234995] [2023-02-18 00:19:20,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:20,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:20,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:20,695 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:20,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-18 00:19:20,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-18 00:19:20,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:20,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:19:20,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:20,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:20,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064234995] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:20,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:20,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2023-02-18 00:19:20,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486431697] [2023-02-18 00:19:20,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:20,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 00:19:20,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:20,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 00:19:20,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 00:19:20,992 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:21,416 INFO L93 Difference]: Finished difference Result 299 states and 316 transitions. [2023-02-18 00:19:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 00:19:21,416 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 00:19:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:21,417 INFO L225 Difference]: With dead ends: 299 [2023-02-18 00:19:21,417 INFO L226 Difference]: Without dead ends: 271 [2023-02-18 00:19:21,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 41 SyntacticMatches, 23 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 00:19:21,417 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 232 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:21,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 224 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-02-18 00:19:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 55. [2023-02-18 00:19:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-18 00:19:21,447 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-18 00:19:21,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:21,447 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-18 00:19:21,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:21,447 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-18 00:19:21,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 00:19:21,448 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:21,448 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:21,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-02-18 00:19:21,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:21,653 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:21,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash 241601816, now seen corresponding path program 7 times [2023-02-18 00:19:21,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:21,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736670205] [2023-02-18 00:19:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:21,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:21,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:21,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736670205] [2023-02-18 00:19:21,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736670205] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:21,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806133118] [2023-02-18 00:19:21,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:21,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:21,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:21,768 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:21,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-18 00:19:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:21,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:19:21,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:21,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:22,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806133118] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:22,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:22,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2023-02-18 00:19:22,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484812476] [2023-02-18 00:19:22,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:22,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 00:19:22,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:22,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 00:19:22,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 00:19:22,076 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:22,481 INFO L93 Difference]: Finished difference Result 329 states and 348 transitions. [2023-02-18 00:19:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 00:19:22,481 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 00:19:22,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:22,482 INFO L225 Difference]: With dead ends: 329 [2023-02-18 00:19:22,482 INFO L226 Difference]: Without dead ends: 301 [2023-02-18 00:19:22,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 41 SyntacticMatches, 24 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 00:19:22,482 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 280 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:22,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 174 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-02-18 00:19:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 57. [2023-02-18 00:19:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:22,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2023-02-18 00:19:22,515 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 39 [2023-02-18 00:19:22,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:22,515 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2023-02-18 00:19:22,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:22,515 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2023-02-18 00:19:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 00:19:22,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:22,516 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:22,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-02-18 00:19:22,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:22,720 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:22,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:22,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1565543885, now seen corresponding path program 14 times [2023-02-18 00:19:22,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:22,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980731487] [2023-02-18 00:19:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:22,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:22,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:22,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980731487] [2023-02-18 00:19:22,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980731487] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:22,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109799733] [2023-02-18 00:19:22,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:22,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:22,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:22,799 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:22,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-18 00:19:22,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:22,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:22,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:19:22,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:22,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:22,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109799733] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:22,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:22,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 15 [2023-02-18 00:19:22,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381023285] [2023-02-18 00:19:22,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:22,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 00:19:22,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:22,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 00:19:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-02-18 00:19:22,970 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:23,093 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2023-02-18 00:19:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 00:19:23,094 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-18 00:19:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:23,094 INFO L225 Difference]: With dead ends: 68 [2023-02-18 00:19:23,094 INFO L226 Difference]: Without dead ends: 66 [2023-02-18 00:19:23,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 30 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2023-02-18 00:19:23,094 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:23,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 136 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:23,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-18 00:19:23,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2023-02-18 00:19:23,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:23,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-02-18 00:19:23,127 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 40 [2023-02-18 00:19:23,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:23,127 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-02-18 00:19:23,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-02-18 00:19:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 00:19:23,128 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:23,128 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:23,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-02-18 00:19:23,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-02-18 00:19:23,332 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:23,332 INFO L85 PathProgramCache]: Analyzing trace with hash -63167651, now seen corresponding path program 15 times [2023-02-18 00:19:23,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:23,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391479336] [2023-02-18 00:19:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:23,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:23,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:23,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391479336] [2023-02-18 00:19:23,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391479336] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:23,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579503428] [2023-02-18 00:19:23,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:23,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:23,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:23,493 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:23,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-18 00:19:23,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-18 00:19:23,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:23,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:19:23,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:23,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:23,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579503428] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:23,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:23,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2023-02-18 00:19:23,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831775372] [2023-02-18 00:19:23,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:23,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-18 00:19:23,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:23,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-18 00:19:23,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 00:19:23,931 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:24,245 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2023-02-18 00:19:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 00:19:24,245 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 00:19:24,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:24,246 INFO L225 Difference]: With dead ends: 129 [2023-02-18 00:19:24,246 INFO L226 Difference]: Without dead ends: 98 [2023-02-18 00:19:24,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=805, Invalid=3355, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 00:19:24,247 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 65 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:24,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 202 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-18 00:19:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2023-02-18 00:19:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-18 00:19:24,284 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-18 00:19:24,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:24,284 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-18 00:19:24,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-18 00:19:24,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 00:19:24,285 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:24,285 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:24,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:24,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-18 00:19:24,490 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:24,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1788348772, now seen corresponding path program 22 times [2023-02-18 00:19:24,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:24,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545622317] [2023-02-18 00:19:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:24,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:24,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:24,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545622317] [2023-02-18 00:19:24,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545622317] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:24,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062176072] [2023-02-18 00:19:24,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:24,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:24,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:24,639 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:24,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-18 00:19:24,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:24,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:24,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:19:24,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:24,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:25,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062176072] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:25,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:25,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2023-02-18 00:19:25,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763885149] [2023-02-18 00:19:25,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:25,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 00:19:25,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:25,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 00:19:25,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 00:19:25,050 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:25,427 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2023-02-18 00:19:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 00:19:25,427 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 00:19:25,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:25,428 INFO L225 Difference]: With dead ends: 166 [2023-02-18 00:19:25,428 INFO L226 Difference]: Without dead ends: 135 [2023-02-18 00:19:25,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 20 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=934, Invalid=4178, Unknown=0, NotChecked=0, Total=5112 [2023-02-18 00:19:25,428 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 85 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:25,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 240 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:25,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-18 00:19:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 61. [2023-02-18 00:19:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-18 00:19:25,470 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-18 00:19:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:25,470 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-18 00:19:25,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-18 00:19:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 00:19:25,471 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:25,471 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:25,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-02-18 00:19:25,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-18 00:19:25,675 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:25,675 INFO L85 PathProgramCache]: Analyzing trace with hash -874168451, now seen corresponding path program 23 times [2023-02-18 00:19:25,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:25,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496792386] [2023-02-18 00:19:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:25,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:25,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:25,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496792386] [2023-02-18 00:19:25,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496792386] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:25,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182876740] [2023-02-18 00:19:25,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:25,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:25,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:25,837 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:25,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-18 00:19:25,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-18 00:19:25,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:25,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:19:25,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:26,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:26,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182876740] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:26,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:26,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2023-02-18 00:19:26,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467535923] [2023-02-18 00:19:26,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:26,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 00:19:26,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:26,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 00:19:26,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1477, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 00:19:26,225 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:26,686 INFO L93 Difference]: Finished difference Result 202 states and 216 transitions. [2023-02-18 00:19:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 00:19:26,686 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 00:19:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:26,686 INFO L225 Difference]: With dead ends: 202 [2023-02-18 00:19:26,686 INFO L226 Difference]: Without dead ends: 171 [2023-02-18 00:19:26,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 45 SyntacticMatches, 21 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1048, Invalid=4804, Unknown=0, NotChecked=0, Total=5852 [2023-02-18 00:19:26,687 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 133 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:26,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 248 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-18 00:19:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 61. [2023-02-18 00:19:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-18 00:19:26,731 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-18 00:19:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:26,731 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-18 00:19:26,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-18 00:19:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 00:19:26,731 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:26,731 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:26,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:26,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:26,932 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:26,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1675962756, now seen corresponding path program 24 times [2023-02-18 00:19:26,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:26,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890377734] [2023-02-18 00:19:26,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:26,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:27,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:27,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890377734] [2023-02-18 00:19:27,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890377734] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:27,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472888581] [2023-02-18 00:19:27,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:27,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:27,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:27,091 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:27,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-18 00:19:27,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-02-18 00:19:27,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:27,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:19:27,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:27,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:27,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472888581] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:27,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:27,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 42 [2023-02-18 00:19:27,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597914072] [2023-02-18 00:19:27,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:27,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-18 00:19:27,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:27,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-18 00:19:27,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 00:19:27,476 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:27,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:27,998 INFO L93 Difference]: Finished difference Result 237 states and 252 transitions. [2023-02-18 00:19:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 00:19:27,998 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 00:19:27,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:27,999 INFO L225 Difference]: With dead ends: 237 [2023-02-18 00:19:27,999 INFO L226 Difference]: Without dead ends: 206 [2023-02-18 00:19:27,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 45 SyntacticMatches, 22 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2626 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1122, Invalid=5198, Unknown=0, NotChecked=0, Total=6320 [2023-02-18 00:19:27,999 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 161 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:28,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 260 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-02-18 00:19:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 61. [2023-02-18 00:19:28,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-18 00:19:28,044 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-18 00:19:28,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:28,044 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-18 00:19:28,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:28,044 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-18 00:19:28,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 00:19:28,044 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:28,045 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:28,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:28,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-18 00:19:28,249 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:28,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:28,250 INFO L85 PathProgramCache]: Analyzing trace with hash -177806435, now seen corresponding path program 25 times [2023-02-18 00:19:28,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:28,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285107148] [2023-02-18 00:19:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:28,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:28,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:28,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285107148] [2023-02-18 00:19:28,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285107148] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:28,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770105518] [2023-02-18 00:19:28,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:28,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:28,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:28,392 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:28,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-18 00:19:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:28,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:19:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:28,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:28,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770105518] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:28,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:28,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2023-02-18 00:19:28,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500446957] [2023-02-18 00:19:28,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:28,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-18 00:19:28,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-18 00:19:28,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 00:19:28,773 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:29,370 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2023-02-18 00:19:29,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-18 00:19:29,370 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 00:19:29,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:29,371 INFO L225 Difference]: With dead ends: 271 [2023-02-18 00:19:29,371 INFO L226 Difference]: Without dead ends: 240 [2023-02-18 00:19:29,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 45 SyntacticMatches, 23 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2642 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1147, Invalid=5333, Unknown=0, NotChecked=0, Total=6480 [2023-02-18 00:19:29,372 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 186 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:29,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 225 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-02-18 00:19:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 61. [2023-02-18 00:19:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-18 00:19:29,417 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-18 00:19:29,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:29,417 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-18 00:19:29,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-18 00:19:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 00:19:29,419 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:29,419 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:29,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-02-18 00:19:29,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-18 00:19:29,624 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash -406573476, now seen corresponding path program 26 times [2023-02-18 00:19:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:29,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879151286] [2023-02-18 00:19:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:29,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:29,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:29,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879151286] [2023-02-18 00:19:29,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879151286] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:29,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692792198] [2023-02-18 00:19:29,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:29,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:29,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:29,770 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:29,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-02-18 00:19:29,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:29,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:29,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:19:29,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:29,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:30,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692792198] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:30,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:30,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 40 [2023-02-18 00:19:30,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731840707] [2023-02-18 00:19:30,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:30,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 00:19:30,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 00:19:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 00:19:30,126 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:30,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:30,719 INFO L93 Difference]: Finished difference Result 304 states and 321 transitions. [2023-02-18 00:19:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-18 00:19:30,719 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 00:19:30,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:30,719 INFO L225 Difference]: With dead ends: 304 [2023-02-18 00:19:30,719 INFO L226 Difference]: Without dead ends: 273 [2023-02-18 00:19:30,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 45 SyntacticMatches, 24 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1120, Invalid=5200, Unknown=0, NotChecked=0, Total=6320 [2023-02-18 00:19:30,720 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 249 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:30,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 258 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:30,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-02-18 00:19:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 61. [2023-02-18 00:19:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-18 00:19:30,771 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-18 00:19:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:30,771 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-18 00:19:30,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:30,771 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-18 00:19:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 00:19:30,771 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:30,771 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:30,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:30,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-18 00:19:30,976 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:30,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:30,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1522331715, now seen corresponding path program 27 times [2023-02-18 00:19:30,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:30,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222711216] [2023-02-18 00:19:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:30,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:31,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:31,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222711216] [2023-02-18 00:19:31,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222711216] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:31,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200442448] [2023-02-18 00:19:31,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:31,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:31,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:31,112 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:31,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-02-18 00:19:31,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-18 00:19:31,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:31,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:19:31,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:31,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:31,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200442448] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:31,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:31,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2023-02-18 00:19:31,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414426937] [2023-02-18 00:19:31,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:31,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 00:19:31,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:31,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 00:19:31,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 00:19:31,458 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:32,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:32,058 INFO L93 Difference]: Finished difference Result 336 states and 354 transitions. [2023-02-18 00:19:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-18 00:19:32,058 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 00:19:32,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:32,059 INFO L225 Difference]: With dead ends: 336 [2023-02-18 00:19:32,059 INFO L226 Difference]: Without dead ends: 305 [2023-02-18 00:19:32,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 45 SyntacticMatches, 25 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1044, Invalid=4808, Unknown=0, NotChecked=0, Total=5852 [2023-02-18 00:19:32,060 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 240 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:32,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 205 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-02-18 00:19:32,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 61. [2023-02-18 00:19:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-18 00:19:32,108 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-18 00:19:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:32,108 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-18 00:19:32,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:32,109 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-18 00:19:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 00:19:32,109 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:32,109 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:32,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:32,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-02-18 00:19:32,314 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:32,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:32,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1281229252, now seen corresponding path program 28 times [2023-02-18 00:19:32,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:32,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949087016] [2023-02-18 00:19:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:32,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:32,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:32,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949087016] [2023-02-18 00:19:32,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949087016] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:32,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732462274] [2023-02-18 00:19:32,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:32,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:32,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:32,455 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:32,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-02-18 00:19:32,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:32,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:32,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:19:32,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:32,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:32,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732462274] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:32,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:32,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2023-02-18 00:19:32,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521727443] [2023-02-18 00:19:32,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:32,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-18 00:19:32,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-18 00:19:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 00:19:32,807 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:33,443 INFO L93 Difference]: Finished difference Result 367 states and 386 transitions. [2023-02-18 00:19:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 00:19:33,443 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 00:19:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:33,444 INFO L225 Difference]: With dead ends: 367 [2023-02-18 00:19:33,444 INFO L226 Difference]: Without dead ends: 336 [2023-02-18 00:19:33,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 45 SyntacticMatches, 26 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1991 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=928, Invalid=4184, Unknown=0, NotChecked=0, Total=5112 [2023-02-18 00:19:33,444 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 309 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:33,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 225 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-02-18 00:19:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 61. [2023-02-18 00:19:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-18 00:19:33,494 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-18 00:19:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:33,494 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-18 00:19:33,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:33,494 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-18 00:19:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 00:19:33,494 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:33,494 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:33,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-02-18 00:19:33,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:33,699 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1081852893, now seen corresponding path program 8 times [2023-02-18 00:19:33,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:33,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063109009] [2023-02-18 00:19:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:33,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:33,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:33,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063109009] [2023-02-18 00:19:33,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063109009] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:33,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889487150] [2023-02-18 00:19:33,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:33,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:33,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:33,852 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:33,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-02-18 00:19:33,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:33,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:33,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:19:33,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:34,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:34,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889487150] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:34,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:34,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2023-02-18 00:19:34,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845863969] [2023-02-18 00:19:34,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:34,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 00:19:34,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 00:19:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 00:19:34,200 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:34,820 INFO L93 Difference]: Finished difference Result 400 states and 421 transitions. [2023-02-18 00:19:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 00:19:34,820 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 00:19:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:34,821 INFO L225 Difference]: With dead ends: 400 [2023-02-18 00:19:34,821 INFO L226 Difference]: Without dead ends: 369 [2023-02-18 00:19:34,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 27 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 00:19:34,821 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 391 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:34,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 175 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-02-18 00:19:34,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 63. [2023-02-18 00:19:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2023-02-18 00:19:34,873 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 43 [2023-02-18 00:19:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:34,873 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2023-02-18 00:19:34,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:34,873 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2023-02-18 00:19:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 00:19:34,873 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:34,873 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:34,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:35,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-02-18 00:19:35,081 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:35,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:35,081 INFO L85 PathProgramCache]: Analyzing trace with hash 105717207, now seen corresponding path program 16 times [2023-02-18 00:19:35,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:35,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807358072] [2023-02-18 00:19:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:35,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 28 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:35,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:35,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807358072] [2023-02-18 00:19:35,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807358072] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:35,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743808144] [2023-02-18 00:19:35,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:35,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:35,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:35,186 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:35,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-02-18 00:19:35,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:35,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:35,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:19:35,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:35,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:35,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743808144] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:35,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:35,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 16 [2023-02-18 00:19:35,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918616184] [2023-02-18 00:19:35,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:35,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 00:19:35,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:35,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 00:19:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-02-18 00:19:35,367 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:35,534 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2023-02-18 00:19:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 00:19:35,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-18 00:19:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:35,535 INFO L225 Difference]: With dead ends: 74 [2023-02-18 00:19:35,535 INFO L226 Difference]: Without dead ends: 72 [2023-02-18 00:19:35,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 34 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2023-02-18 00:19:35,535 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:35,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 174 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:35,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-18 00:19:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2023-02-18 00:19:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:35,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2023-02-18 00:19:35,590 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 44 [2023-02-18 00:19:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:35,590 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2023-02-18 00:19:35,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2023-02-18 00:19:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 00:19:35,591 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:35,591 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:35,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:35,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:35,791 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:35,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:35,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1215128889, now seen corresponding path program 17 times [2023-02-18 00:19:35,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:35,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759052652] [2023-02-18 00:19:35,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:35,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:35,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:35,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759052652] [2023-02-18 00:19:35,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759052652] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:35,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945465331] [2023-02-18 00:19:35,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:35,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:35,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:35,964 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:35,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-02-18 00:19:36,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-18 00:19:36,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:36,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:19:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:36,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:36,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945465331] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:36,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:36,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-02-18 00:19:36,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498723629] [2023-02-18 00:19:36,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:36,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 00:19:36,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:36,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 00:19:36,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 00:19:36,442 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:36,810 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2023-02-18 00:19:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 00:19:36,811 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 00:19:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:36,811 INFO L225 Difference]: With dead ends: 142 [2023-02-18 00:19:36,811 INFO L226 Difference]: Without dead ends: 108 [2023-02-18 00:19:36,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 49 SyntacticMatches, 21 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=950, Invalid=4020, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 00:19:36,812 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:36,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 212 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-18 00:19:36,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2023-02-18 00:19:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-18 00:19:36,872 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-18 00:19:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:36,873 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-18 00:19:36,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-18 00:19:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 00:19:36,873 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:36,873 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:36,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:37,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:37,079 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:37,079 INFO L85 PathProgramCache]: Analyzing trace with hash -185630472, now seen corresponding path program 29 times [2023-02-18 00:19:37,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:37,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073270759] [2023-02-18 00:19:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:37,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:37,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:37,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073270759] [2023-02-18 00:19:37,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073270759] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:37,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318080018] [2023-02-18 00:19:37,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:37,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:37,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:37,251 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:37,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-02-18 00:19:37,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-18 00:19:37,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:37,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:19:37,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:37,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:37,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318080018] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:37,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:37,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2023-02-18 00:19:37,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14583841] [2023-02-18 00:19:37,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:37,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 00:19:37,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 00:19:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 00:19:37,698 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:38,167 INFO L93 Difference]: Finished difference Result 183 states and 197 transitions. [2023-02-18 00:19:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 00:19:38,167 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 00:19:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:38,168 INFO L225 Difference]: With dead ends: 183 [2023-02-18 00:19:38,168 INFO L226 Difference]: Without dead ends: 149 [2023-02-18 00:19:38,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 49 SyntacticMatches, 22 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1114, Invalid=5048, Unknown=0, NotChecked=0, Total=6162 [2023-02-18 00:19:38,171 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 115 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:38,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 182 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:38,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-18 00:19:38,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2023-02-18 00:19:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-18 00:19:38,236 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-18 00:19:38,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:38,236 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-18 00:19:38,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-18 00:19:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 00:19:38,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:38,237 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:38,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:38,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:38,442 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:38,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:38,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1477742247, now seen corresponding path program 30 times [2023-02-18 00:19:38,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:38,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816353482] [2023-02-18 00:19:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:38,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:38,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:38,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816353482] [2023-02-18 00:19:38,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816353482] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:38,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129672899] [2023-02-18 00:19:38,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:38,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:38,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:38,617 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:38,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-02-18 00:19:38,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-18 00:19:38,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:38,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:19:38,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:38,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:39,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129672899] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:39,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:39,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2023-02-18 00:19:39,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985593213] [2023-02-18 00:19:39,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:39,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 00:19:39,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 00:19:39,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 00:19:39,069 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:39,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:39,688 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2023-02-18 00:19:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-18 00:19:39,688 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 00:19:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:39,688 INFO L225 Difference]: With dead ends: 223 [2023-02-18 00:19:39,688 INFO L226 Difference]: Without dead ends: 189 [2023-02-18 00:19:39,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 49 SyntacticMatches, 23 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1266, Invalid=5874, Unknown=0, NotChecked=0, Total=7140 [2023-02-18 00:19:39,689 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 148 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:39,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 274 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:39,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-18 00:19:39,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 67. [2023-02-18 00:19:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-18 00:19:39,755 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-18 00:19:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:39,755 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-18 00:19:39,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-18 00:19:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 00:19:39,756 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:39,756 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:39,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:39,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:39,969 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:39,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:39,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1519423272, now seen corresponding path program 31 times [2023-02-18 00:19:39,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:39,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358707674] [2023-02-18 00:19:39,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:39,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:40,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:40,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358707674] [2023-02-18 00:19:40,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358707674] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:40,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48118443] [2023-02-18 00:19:40,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:40,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:40,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:40,140 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:40,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-02-18 00:19:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:40,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:19:40,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:40,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:40,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48118443] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:40,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:40,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 46 [2023-02-18 00:19:40,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229734145] [2023-02-18 00:19:40,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:40,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-18 00:19:40,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:40,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-18 00:19:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1700, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 00:19:40,604 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:41,318 INFO L93 Difference]: Finished difference Result 262 states and 278 transitions. [2023-02-18 00:19:41,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-18 00:19:41,319 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 00:19:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:41,319 INFO L225 Difference]: With dead ends: 262 [2023-02-18 00:19:41,319 INFO L226 Difference]: Without dead ends: 228 [2023-02-18 00:19:41,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 49 SyntacticMatches, 24 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3310 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1377, Invalid=6455, Unknown=0, NotChecked=0, Total=7832 [2023-02-18 00:19:41,320 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 151 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:41,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 282 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:41,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-18 00:19:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 67. [2023-02-18 00:19:41,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:41,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-18 00:19:41,391 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-18 00:19:41,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:41,391 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-18 00:19:41,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:41,391 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-18 00:19:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 00:19:41,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:41,391 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:41,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-02-18 00:19:41,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-02-18 00:19:41,593 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:41,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:41,594 INFO L85 PathProgramCache]: Analyzing trace with hash 834536825, now seen corresponding path program 32 times [2023-02-18 00:19:41,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:41,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753979914] [2023-02-18 00:19:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:41,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:41,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:41,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753979914] [2023-02-18 00:19:41,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753979914] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:41,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309204615] [2023-02-18 00:19:41,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:41,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:41,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:41,805 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:41,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-02-18 00:19:41,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:41,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:41,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:19:41,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:42,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:42,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309204615] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:42,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:42,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2023-02-18 00:19:42,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261243110] [2023-02-18 00:19:42,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:42,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-18 00:19:42,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:42,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-18 00:19:42,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 00:19:42,223 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:42,977 INFO L93 Difference]: Finished difference Result 300 states and 317 transitions. [2023-02-18 00:19:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-18 00:19:42,977 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 00:19:42,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:42,978 INFO L225 Difference]: With dead ends: 300 [2023-02-18 00:19:42,978 INFO L226 Difference]: Without dead ends: 266 [2023-02-18 00:19:42,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 49 SyntacticMatches, 25 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3396 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1435, Invalid=6755, Unknown=0, NotChecked=0, Total=8190 [2023-02-18 00:19:42,978 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 146 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:42,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 246 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:42,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-02-18 00:19:43,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 67. [2023-02-18 00:19:43,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-18 00:19:43,051 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-18 00:19:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:43,051 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-18 00:19:43,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-18 00:19:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 00:19:43,051 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:43,051 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:43,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-02-18 00:19:43,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-02-18 00:19:43,256 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:43,256 INFO L85 PathProgramCache]: Analyzing trace with hash -890644296, now seen corresponding path program 33 times [2023-02-18 00:19:43,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:43,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562014114] [2023-02-18 00:19:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:43,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:43,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:43,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562014114] [2023-02-18 00:19:43,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562014114] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:43,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727135592] [2023-02-18 00:19:43,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:43,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:43,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:43,417 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:43,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-02-18 00:19:43,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-18 00:19:43,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:43,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:19:43,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:43,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:43,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727135592] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:43,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:43,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 44 [2023-02-18 00:19:43,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662887775] [2023-02-18 00:19:43,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:43,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 00:19:43,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:43,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 00:19:43,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 00:19:43,827 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:44,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:44,634 INFO L93 Difference]: Finished difference Result 337 states and 355 transitions. [2023-02-18 00:19:44,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-18 00:19:44,634 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 00:19:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:44,634 INFO L225 Difference]: With dead ends: 337 [2023-02-18 00:19:44,634 INFO L226 Difference]: Without dead ends: 303 [2023-02-18 00:19:44,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 49 SyntacticMatches, 26 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3355 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1434, Invalid=6756, Unknown=0, NotChecked=0, Total=8190 [2023-02-18 00:19:44,635 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 225 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:44,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 248 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-02-18 00:19:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 67. [2023-02-18 00:19:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-18 00:19:44,709 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-18 00:19:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:44,709 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-18 00:19:44,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-18 00:19:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 00:19:44,709 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:44,709 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:44,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:44,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-02-18 00:19:44,914 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:44,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:44,914 INFO L85 PathProgramCache]: Analyzing trace with hash 23536025, now seen corresponding path program 34 times [2023-02-18 00:19:44,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:44,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740733503] [2023-02-18 00:19:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:44,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:45,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:45,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740733503] [2023-02-18 00:19:45,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740733503] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:45,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028277134] [2023-02-18 00:19:45,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:45,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:45,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:45,093 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:45,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-02-18 00:19:45,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:45,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:45,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:19:45,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:45,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:45,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028277134] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:45,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:45,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2023-02-18 00:19:45,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614234271] [2023-02-18 00:19:45,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:45,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 00:19:45,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:45,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 00:19:45,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 00:19:45,536 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:46,377 INFO L93 Difference]: Finished difference Result 373 states and 392 transitions. [2023-02-18 00:19:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-18 00:19:46,377 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 00:19:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:46,378 INFO L225 Difference]: With dead ends: 373 [2023-02-18 00:19:46,378 INFO L226 Difference]: Without dead ends: 339 [2023-02-18 00:19:46,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 49 SyntacticMatches, 27 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3181 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1374, Invalid=6458, Unknown=0, NotChecked=0, Total=7832 [2023-02-18 00:19:46,378 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 308 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:46,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 206 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-02-18 00:19:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 67. [2023-02-18 00:19:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-18 00:19:46,451 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-18 00:19:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:46,451 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-18 00:19:46,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-18 00:19:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 00:19:46,451 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:46,451 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:46,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-02-18 00:19:46,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:46,656 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:46,657 INFO L85 PathProgramCache]: Analyzing trace with hash -778258280, now seen corresponding path program 35 times [2023-02-18 00:19:46,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:46,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904245756] [2023-02-18 00:19:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:46,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:46,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:46,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904245756] [2023-02-18 00:19:46,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904245756] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:46,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538332479] [2023-02-18 00:19:46,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:46,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:46,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:46,917 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:46,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-02-18 00:19:46,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-18 00:19:46,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:46,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:19:46,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:47,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:47,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538332479] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:47,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:47,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 42 [2023-02-18 00:19:47,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340163388] [2023-02-18 00:19:47,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:47,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-18 00:19:47,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:47,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-18 00:19:47,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 00:19:47,338 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:48,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:48,214 INFO L93 Difference]: Finished difference Result 408 states and 428 transitions. [2023-02-18 00:19:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-18 00:19:48,214 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 00:19:48,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:48,215 INFO L225 Difference]: With dead ends: 408 [2023-02-18 00:19:48,215 INFO L226 Difference]: Without dead ends: 374 [2023-02-18 00:19:48,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 49 SyntacticMatches, 28 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2876 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1261, Invalid=5879, Unknown=0, NotChecked=0, Total=7140 [2023-02-18 00:19:48,215 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 249 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:48,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 256 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-02-18 00:19:48,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 67. [2023-02-18 00:19:48,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-18 00:19:48,293 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-18 00:19:48,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:48,293 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-18 00:19:48,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-18 00:19:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 00:19:48,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:48,293 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:48,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-02-18 00:19:48,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:48,494 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:48,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:48,494 INFO L85 PathProgramCache]: Analyzing trace with hash 719898041, now seen corresponding path program 36 times [2023-02-18 00:19:48,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:48,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523721056] [2023-02-18 00:19:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:48,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:48,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:48,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523721056] [2023-02-18 00:19:48,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523721056] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:48,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209169608] [2023-02-18 00:19:48,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:48,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:48,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:48,680 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:48,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-02-18 00:19:48,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-18 00:19:48,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:48,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:19:48,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:48,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:49,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209169608] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:49,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:49,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2023-02-18 00:19:49,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823043006] [2023-02-18 00:19:49,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:49,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-18 00:19:49,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:49,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-18 00:19:49,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 00:19:49,097 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:49,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:49,980 INFO L93 Difference]: Finished difference Result 442 states and 463 transitions. [2023-02-18 00:19:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-18 00:19:49,980 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 00:19:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:49,981 INFO L225 Difference]: With dead ends: 442 [2023-02-18 00:19:49,981 INFO L226 Difference]: Without dead ends: 408 [2023-02-18 00:19:49,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 49 SyntacticMatches, 29 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1107, Invalid=5055, Unknown=0, NotChecked=0, Total=6162 [2023-02-18 00:19:49,981 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 310 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:49,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 216 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-02-18 00:19:50,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 67. [2023-02-18 00:19:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-18 00:19:50,064 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-18 00:19:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:50,064 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-18 00:19:50,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-18 00:19:50,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 00:19:50,064 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:50,064 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:50,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:50,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:50,269 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:50,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:50,270 INFO L85 PathProgramCache]: Analyzing trace with hash 491131000, now seen corresponding path program 9 times [2023-02-18 00:19:50,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:50,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191567592] [2023-02-18 00:19:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:50,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:50,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:50,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191567592] [2023-02-18 00:19:50,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191567592] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:50,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196192757] [2023-02-18 00:19:50,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:50,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:50,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:50,443 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:50,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-02-18 00:19:50,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-18 00:19:50,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:50,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:19:50,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:50,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:50,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196192757] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:50,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:50,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2023-02-18 00:19:50,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708401440] [2023-02-18 00:19:50,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:50,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 00:19:50,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:50,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 00:19:50,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 00:19:50,862 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:51,782 INFO L93 Difference]: Finished difference Result 478 states and 501 transitions. [2023-02-18 00:19:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-18 00:19:51,783 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 00:19:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:51,784 INFO L225 Difference]: With dead ends: 478 [2023-02-18 00:19:51,784 INFO L226 Difference]: Without dead ends: 444 [2023-02-18 00:19:51,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 49 SyntacticMatches, 30 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=941, Invalid=4029, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 00:19:51,785 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 383 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:51,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 225 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-02-18 00:19:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 69. [2023-02-18 00:19:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2023-02-18 00:19:51,875 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 47 [2023-02-18 00:19:51,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:51,875 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2023-02-18 00:19:51,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2023-02-18 00:19:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 00:19:51,875 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:51,876 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:51,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-02-18 00:19:52,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-02-18 00:19:52,076 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:52,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1809280333, now seen corresponding path program 18 times [2023-02-18 00:19:52,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:52,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201099228] [2023-02-18 00:19:52,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:52,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 36 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:52,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:52,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201099228] [2023-02-18 00:19:52,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201099228] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:52,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015207141] [2023-02-18 00:19:52,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:52,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:52,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:52,175 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:52,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-02-18 00:19:52,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-18 00:19:52,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:52,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:19:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:52,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:52,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015207141] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:52,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:52,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 17 [2023-02-18 00:19:52,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946285307] [2023-02-18 00:19:52,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:52,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 00:19:52,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:52,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 00:19:52,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2023-02-18 00:19:52,402 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:52,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:52,599 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2023-02-18 00:19:52,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 00:19:52,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-18 00:19:52,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:52,600 INFO L225 Difference]: With dead ends: 80 [2023-02-18 00:19:52,600 INFO L226 Difference]: Without dead ends: 78 [2023-02-18 00:19:52,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 64 SyntacticMatches, 38 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=542, Unknown=0, NotChecked=0, Total=812 [2023-02-18 00:19:52,600 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:52,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 155 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:52,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-18 00:19:52,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2023-02-18 00:19:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2023-02-18 00:19:52,687 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 48 [2023-02-18 00:19:52,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:52,688 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2023-02-18 00:19:52,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:52,688 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2023-02-18 00:19:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 00:19:52,688 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:52,688 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:52,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-02-18 00:19:52,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:52,892 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:52,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1574007517, now seen corresponding path program 19 times [2023-02-18 00:19:52,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:52,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837878949] [2023-02-18 00:19:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:52,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:53,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:53,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837878949] [2023-02-18 00:19:53,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837878949] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:53,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647034043] [2023-02-18 00:19:53,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:53,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:53,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:53,089 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:53,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-02-18 00:19:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:53,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:19:53,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:53,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:53,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647034043] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:53,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:53,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-02-18 00:19:53,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866728641] [2023-02-18 00:19:53,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:53,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-18 00:19:53,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:53,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-18 00:19:53,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=2229, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 00:19:53,620 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:54,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:54,073 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2023-02-18 00:19:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 00:19:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 00:19:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:54,073 INFO L225 Difference]: With dead ends: 155 [2023-02-18 00:19:54,074 INFO L226 Difference]: Without dead ends: 118 [2023-02-18 00:19:54,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 53 SyntacticMatches, 23 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1107, Invalid=4745, Unknown=0, NotChecked=0, Total=5852 [2023-02-18 00:19:54,074 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:54,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 198 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-18 00:19:54,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2023-02-18 00:19:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-18 00:19:54,169 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-18 00:19:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:54,169 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-18 00:19:54,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-18 00:19:54,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 00:19:54,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:54,170 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:54,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:54,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-02-18 00:19:54,375 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:54,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:54,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2142136548, now seen corresponding path program 37 times [2023-02-18 00:19:54,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:54,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776547068] [2023-02-18 00:19:54,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:54,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:54,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:54,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776547068] [2023-02-18 00:19:54,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776547068] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:54,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022319326] [2023-02-18 00:19:54,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:54,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:54,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:54,571 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:54,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-02-18 00:19:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:54,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:19:54,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:54,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:55,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022319326] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:55,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:55,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 52 [2023-02-18 00:19:55,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309342114] [2023-02-18 00:19:55,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:55,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-18 00:19:55,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-18 00:19:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2159, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 00:19:55,090 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:55,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:55,744 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2023-02-18 00:19:55,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 00:19:55,744 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 00:19:55,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:55,744 INFO L225 Difference]: With dead ends: 200 [2023-02-18 00:19:55,744 INFO L226 Difference]: Without dead ends: 163 [2023-02-18 00:19:55,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 53 SyntacticMatches, 24 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1310, Invalid=6000, Unknown=0, NotChecked=0, Total=7310 [2023-02-18 00:19:55,745 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:55,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 295 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:55,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-02-18 00:19:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 73. [2023-02-18 00:19:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-18 00:19:55,846 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-18 00:19:55,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:55,846 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-18 00:19:55,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:55,847 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-18 00:19:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 00:19:55,847 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:55,847 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:55,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-02-18 00:19:56,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-02-18 00:19:56,051 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:56,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:56,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2032955133, now seen corresponding path program 38 times [2023-02-18 00:19:56,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:56,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536242393] [2023-02-18 00:19:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:56,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:56,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:56,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536242393] [2023-02-18 00:19:56,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536242393] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:56,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422161148] [2023-02-18 00:19:56,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:56,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:56,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:56,243 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:56,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-02-18 00:19:56,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:56,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:56,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:19:56,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:56,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:56,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422161148] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:56,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:56,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 51 [2023-02-18 00:19:56,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983231791] [2023-02-18 00:19:56,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:56,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-18 00:19:56,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:56,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-18 00:19:56,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=2087, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 00:19:56,740 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:57,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:57,521 INFO L93 Difference]: Finished difference Result 244 states and 260 transitions. [2023-02-18 00:19:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-18 00:19:57,521 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 00:19:57,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:57,522 INFO L225 Difference]: With dead ends: 244 [2023-02-18 00:19:57,522 INFO L226 Difference]: Without dead ends: 207 [2023-02-18 00:19:57,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 53 SyntacticMatches, 25 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1505, Invalid=7051, Unknown=0, NotChecked=0, Total=8556 [2023-02-18 00:19:57,522 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 135 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:57,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 222 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:57,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-18 00:19:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 73. [2023-02-18 00:19:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-18 00:19:57,628 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-18 00:19:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:57,628 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-18 00:19:57,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-18 00:19:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 00:19:57,628 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:57,629 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:57,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-02-18 00:19:57,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-02-18 00:19:57,829 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:57,829 INFO L85 PathProgramCache]: Analyzing trace with hash 227972860, now seen corresponding path program 39 times [2023-02-18 00:19:57,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:57,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120456233] [2023-02-18 00:19:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:57,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:58,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:58,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120456233] [2023-02-18 00:19:58,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120456233] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:58,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108453617] [2023-02-18 00:19:58,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:58,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:58,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:58,022 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:58,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-02-18 00:19:58,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-18 00:19:58,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:58,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:19:58,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:58,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:58,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108453617] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:58,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:58,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 50 [2023-02-18 00:19:58,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876172696] [2023-02-18 00:19:58,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:58,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 00:19:58,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:58,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 00:19:58,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 00:19:58,522 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:59,448 INFO L93 Difference]: Finished difference Result 287 states and 304 transitions. [2023-02-18 00:19:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-18 00:19:59,449 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 00:19:59,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:59,449 INFO L225 Difference]: With dead ends: 287 [2023-02-18 00:19:59,449 INFO L226 Difference]: Without dead ends: 250 [2023-02-18 00:19:59,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 53 SyntacticMatches, 26 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1659, Invalid=7847, Unknown=0, NotChecked=0, Total=9506 [2023-02-18 00:19:59,450 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 193 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:59,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 247 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-02-18 00:19:59,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 73. [2023-02-18 00:19:59,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-18 00:19:59,558 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-18 00:19:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:59,558 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-18 00:19:59,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-18 00:19:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 00:19:59,559 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:59,559 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:59,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-02-18 00:19:59,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-02-18 00:19:59,763 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:59,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:59,764 INFO L85 PathProgramCache]: Analyzing trace with hash -245894371, now seen corresponding path program 40 times [2023-02-18 00:19:59,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:59,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814032877] [2023-02-18 00:19:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:59,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:59,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:59,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814032877] [2023-02-18 00:19:59,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814032877] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:59,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751089157] [2023-02-18 00:19:59,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:59,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:59,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:59,951 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:19:59,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-02-18 00:20:00,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:20:00,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:00,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:20:00,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:00,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:00,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751089157] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:00,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:00,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2023-02-18 00:20:00,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995314347] [2023-02-18 00:20:00,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:00,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 00:20:00,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:00,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 00:20:00,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 00:20:00,463 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:01,507 INFO L93 Difference]: Finished difference Result 329 states and 347 transitions. [2023-02-18 00:20:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 00:20:01,507 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 00:20:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:01,507 INFO L225 Difference]: With dead ends: 329 [2023-02-18 00:20:01,507 INFO L226 Difference]: Without dead ends: 292 [2023-02-18 00:20:01,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 53 SyntacticMatches, 27 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4245 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1757, Invalid=8343, Unknown=0, NotChecked=0, Total=10100 [2023-02-18 00:20:01,508 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 202 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:01,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 220 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:01,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-02-18 00:20:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 73. [2023-02-18 00:20:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:01,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-18 00:20:01,618 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-18 00:20:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:01,619 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-18 00:20:01,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:01,619 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-18 00:20:01,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 00:20:01,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:01,619 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:01,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:01,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:01,824 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1646653732, now seen corresponding path program 41 times [2023-02-18 00:20:01,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:01,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539599609] [2023-02-18 00:20:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:01,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 127 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:02,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:02,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539599609] [2023-02-18 00:20:02,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539599609] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:02,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059655387] [2023-02-18 00:20:02,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:20:02,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:02,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:02,016 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:02,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-02-18 00:20:02,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-02-18 00:20:02,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:02,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:20:02,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:02,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:02,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059655387] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:02,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:02,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 48 [2023-02-18 00:20:02,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782287948] [2023-02-18 00:20:02,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:02,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 00:20:02,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:02,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 00:20:02,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 00:20:02,488 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:03,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:03,625 INFO L93 Difference]: Finished difference Result 370 states and 389 transitions. [2023-02-18 00:20:03,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-18 00:20:03,625 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 00:20:03,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:03,626 INFO L225 Difference]: With dead ends: 370 [2023-02-18 00:20:03,626 INFO L226 Difference]: Without dead ends: 333 [2023-02-18 00:20:03,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 53 SyntacticMatches, 28 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1790, Invalid=8512, Unknown=0, NotChecked=0, Total=10302 [2023-02-18 00:20:03,626 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 203 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:03,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 235 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:03,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-02-18 00:20:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 73. [2023-02-18 00:20:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-18 00:20:03,737 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-18 00:20:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:03,737 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-18 00:20:03,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-18 00:20:03,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 00:20:03,737 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:03,737 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:03,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:03,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:03,938 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:03,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:03,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1356201789, now seen corresponding path program 42 times [2023-02-18 00:20:03,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:03,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674033938] [2023-02-18 00:20:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:03,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:04,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:04,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674033938] [2023-02-18 00:20:04,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674033938] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:04,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681109731] [2023-02-18 00:20:04,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:20:04,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:04,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:04,127 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:04,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-02-18 00:20:04,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-02-18 00:20:04,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:04,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:20:04,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:04,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:04,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681109731] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:04,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:04,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 47 [2023-02-18 00:20:04,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863574901] [2023-02-18 00:20:04,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:04,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 00:20:04,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:04,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 00:20:04,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 00:20:04,595 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:05,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:05,800 INFO L93 Difference]: Finished difference Result 410 states and 430 transitions. [2023-02-18 00:20:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-18 00:20:05,800 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 00:20:05,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:05,801 INFO L225 Difference]: With dead ends: 410 [2023-02-18 00:20:05,801 INFO L226 Difference]: Without dead ends: 373 [2023-02-18 00:20:05,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 53 SyntacticMatches, 29 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4160 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1755, Invalid=8345, Unknown=0, NotChecked=0, Total=10100 [2023-02-18 00:20:05,802 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 256 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:05,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 223 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:05,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-02-18 00:20:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 73. [2023-02-18 00:20:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-18 00:20:05,917 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-18 00:20:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:05,918 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-18 00:20:05,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-18 00:20:05,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 00:20:05,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:05,918 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:05,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-02-18 00:20:06,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:06,123 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:06,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:06,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1314520764, now seen corresponding path program 43 times [2023-02-18 00:20:06,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:06,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575856709] [2023-02-18 00:20:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:06,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:06,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:06,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575856709] [2023-02-18 00:20:06,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575856709] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:06,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162533898] [2023-02-18 00:20:06,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:20:06,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:06,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:06,310 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:06,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-02-18 00:20:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:06,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:20:06,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:06,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:06,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162533898] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:06,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:06,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 46 [2023-02-18 00:20:06,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869109954] [2023-02-18 00:20:06,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:06,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-18 00:20:06,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:06,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-18 00:20:06,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 00:20:06,788 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:08,088 INFO L93 Difference]: Finished difference Result 449 states and 470 transitions. [2023-02-18 00:20:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-18 00:20:08,088 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 00:20:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:08,089 INFO L225 Difference]: With dead ends: 449 [2023-02-18 00:20:08,089 INFO L226 Difference]: Without dead ends: 412 [2023-02-18 00:20:08,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 53 SyntacticMatches, 30 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3891 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1655, Invalid=7851, Unknown=0, NotChecked=0, Total=9506 [2023-02-18 00:20:08,089 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 295 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:08,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 311 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-18 00:20:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 73. [2023-02-18 00:20:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-18 00:20:08,206 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-18 00:20:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:08,206 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-18 00:20:08,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-18 00:20:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 00:20:08,207 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:08,207 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:08,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:08,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-02-18 00:20:08,407 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:08,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:08,407 INFO L85 PathProgramCache]: Analyzing trace with hash -626486435, now seen corresponding path program 44 times [2023-02-18 00:20:08,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:08,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081816508] [2023-02-18 00:20:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:08,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:08,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:08,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081816508] [2023-02-18 00:20:08,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081816508] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:08,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588633389] [2023-02-18 00:20:08,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:20:08,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:08,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:08,597 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:08,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-02-18 00:20:08,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:20:08,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:08,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:20:08,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:08,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:09,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588633389] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:09,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:09,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2023-02-18 00:20:09,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901684901] [2023-02-18 00:20:09,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:09,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-18 00:20:09,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:09,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-18 00:20:09,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 00:20:09,044 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:10,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:10,376 INFO L93 Difference]: Finished difference Result 487 states and 509 transitions. [2023-02-18 00:20:10,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 00:20:10,376 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 00:20:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:10,377 INFO L225 Difference]: With dead ends: 487 [2023-02-18 00:20:10,377 INFO L226 Difference]: Without dead ends: 450 [2023-02-18 00:20:10,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 53 SyntacticMatches, 31 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1499, Invalid=7057, Unknown=0, NotChecked=0, Total=8556 [2023-02-18 00:20:10,377 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 354 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:10,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 295 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-02-18 00:20:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 73. [2023-02-18 00:20:10,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-18 00:20:10,501 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-18 00:20:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:10,501 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-18 00:20:10,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-18 00:20:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 00:20:10,501 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:10,501 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:10,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-02-18 00:20:10,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:10,702 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:10,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:10,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1943299740, now seen corresponding path program 45 times [2023-02-18 00:20:10,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:10,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776654375] [2023-02-18 00:20:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:10,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:10,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:10,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776654375] [2023-02-18 00:20:10,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776654375] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:10,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574672118] [2023-02-18 00:20:10,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:20:10,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:10,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:10,888 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:10,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-02-18 00:20:10,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-18 00:20:10,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:10,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:20:10,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:11,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:11,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574672118] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:11,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:11,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 44 [2023-02-18 00:20:11,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006178927] [2023-02-18 00:20:11,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:11,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 00:20:11,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 00:20:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 00:20:11,398 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:12,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:12,797 INFO L93 Difference]: Finished difference Result 524 states and 547 transitions. [2023-02-18 00:20:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-18 00:20:12,797 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 00:20:12,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:12,798 INFO L225 Difference]: With dead ends: 524 [2023-02-18 00:20:12,798 INFO L226 Difference]: Without dead ends: 487 [2023-02-18 00:20:12,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 53 SyntacticMatches, 32 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2917 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1302, Invalid=6008, Unknown=0, NotChecked=0, Total=7310 [2023-02-18 00:20:12,799 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 343 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:12,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 325 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-02-18 00:20:12,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 73. [2023-02-18 00:20:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:12,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-18 00:20:12,922 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-18 00:20:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:12,922 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-18 00:20:12,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-18 00:20:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 00:20:12,922 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:12,923 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:12,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:13,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:13,123 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:13,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1437487235, now seen corresponding path program 10 times [2023-02-18 00:20:13,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:13,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490179282] [2023-02-18 00:20:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:13,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:13,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:13,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490179282] [2023-02-18 00:20:13,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490179282] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:13,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058097651] [2023-02-18 00:20:13,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:20:13,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:13,311 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:13,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-02-18 00:20:13,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:20:13,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:13,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:20:13,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:13,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:13,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058097651] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:13,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:13,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 43 [2023-02-18 00:20:13,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371899129] [2023-02-18 00:20:13,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:13,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 00:20:13,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:13,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 00:20:13,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1439, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 00:20:13,770 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:15,164 INFO L93 Difference]: Finished difference Result 563 states and 588 transitions. [2023-02-18 00:20:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-18 00:20:15,164 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-18 00:20:15,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:15,165 INFO L225 Difference]: With dead ends: 563 [2023-02-18 00:20:15,165 INFO L226 Difference]: Without dead ends: 526 [2023-02-18 00:20:15,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 53 SyntacticMatches, 33 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1097, Invalid=4755, Unknown=0, NotChecked=0, Total=5852 [2023-02-18 00:20:15,165 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 403 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:15,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 211 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:15,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-02-18 00:20:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 75. [2023-02-18 00:20:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2023-02-18 00:20:15,299 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 51 [2023-02-18 00:20:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:15,299 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2023-02-18 00:20:15,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2023-02-18 00:20:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 00:20:15,299 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:15,299 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:15,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2023-02-18 00:20:15,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-02-18 00:20:15,500 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:15,500 INFO L85 PathProgramCache]: Analyzing trace with hash -723168425, now seen corresponding path program 20 times [2023-02-18 00:20:15,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:15,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826710517] [2023-02-18 00:20:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:15,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:15,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:15,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826710517] [2023-02-18 00:20:15,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826710517] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:15,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855582678] [2023-02-18 00:20:15,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:20:15,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:15,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:15,615 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:15,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-02-18 00:20:15,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:20:15,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:15,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:20:15,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:15,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:15,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855582678] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:15,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:15,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 18 [2023-02-18 00:20:15,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628780441] [2023-02-18 00:20:15,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:15,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 00:20:15,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:15,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 00:20:15,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:20:15,871 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:16,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:16,136 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2023-02-18 00:20:16,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 00:20:16,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-18 00:20:16,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:16,137 INFO L225 Difference]: With dead ends: 86 [2023-02-18 00:20:16,137 INFO L226 Difference]: Without dead ends: 84 [2023-02-18 00:20:16,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 42 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2023-02-18 00:20:16,137 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 76 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:16,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 168 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-18 00:20:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2023-02-18 00:20:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2023-02-18 00:20:16,270 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 52 [2023-02-18 00:20:16,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:16,270 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2023-02-18 00:20:16,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:16,270 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2023-02-18 00:20:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 00:20:16,270 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:16,270 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:16,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-02-18 00:20:16,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-02-18 00:20:16,470 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:16,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:16,471 INFO L85 PathProgramCache]: Analyzing trace with hash -349749319, now seen corresponding path program 21 times [2023-02-18 00:20:16,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:16,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636244892] [2023-02-18 00:20:16,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:16,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:16,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:16,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636244892] [2023-02-18 00:20:16,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636244892] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:16,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051195300] [2023-02-18 00:20:16,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:20:16,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:16,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:16,702 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:16,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-02-18 00:20:16,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-18 00:20:16,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:16,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:20:16,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:17,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:17,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051195300] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:17,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:17,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2023-02-18 00:20:17,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339770038] [2023-02-18 00:20:17,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:17,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-18 00:20:17,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-18 00:20:17,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=2583, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 00:20:17,304 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:17,919 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2023-02-18 00:20:17,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 00:20:17,919 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 00:20:17,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:17,919 INFO L225 Difference]: With dead ends: 168 [2023-02-18 00:20:17,919 INFO L226 Difference]: Without dead ends: 128 [2023-02-18 00:20:17,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 57 SyntacticMatches, 25 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3462 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1276, Invalid=5530, Unknown=0, NotChecked=0, Total=6806 [2023-02-18 00:20:17,920 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:17,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 222 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:17,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-18 00:20:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2023-02-18 00:20:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-18 00:20:18,067 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-18 00:20:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:18,067 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-18 00:20:18,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-18 00:20:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 00:20:18,068 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:18,068 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:18,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-02-18 00:20:18,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:18,272 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:18,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:18,273 INFO L85 PathProgramCache]: Analyzing trace with hash -865260424, now seen corresponding path program 46 times [2023-02-18 00:20:18,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:18,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948248577] [2023-02-18 00:20:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:18,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:18,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:18,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948248577] [2023-02-18 00:20:18,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948248577] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:18,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829909410] [2023-02-18 00:20:18,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:20:18,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:18,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:18,505 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:18,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-02-18 00:20:18,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:20:18,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:18,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:20:18,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:18,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:19,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829909410] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:19,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:19,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2023-02-18 00:20:19,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443197461] [2023-02-18 00:20:19,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:19,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-18 00:20:19,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:19,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-18 00:20:19,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=2508, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 00:20:19,096 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:19,937 INFO L93 Difference]: Finished difference Result 217 states and 233 transitions. [2023-02-18 00:20:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 00:20:19,938 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 00:20:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:19,938 INFO L225 Difference]: With dead ends: 217 [2023-02-18 00:20:19,938 INFO L226 Difference]: Without dead ends: 177 [2023-02-18 00:20:19,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 57 SyntacticMatches, 26 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4017 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1522, Invalid=7034, Unknown=0, NotChecked=0, Total=8556 [2023-02-18 00:20:19,939 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 102 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:19,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 258 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-18 00:20:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 79. [2023-02-18 00:20:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-18 00:20:20,094 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-18 00:20:20,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:20,094 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-18 00:20:20,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-18 00:20:20,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 00:20:20,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:20,095 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:20,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:20,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:20,296 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:20,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1436079143, now seen corresponding path program 47 times [2023-02-18 00:20:20,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:20,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972886432] [2023-02-18 00:20:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:20,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:20,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:20,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972886432] [2023-02-18 00:20:20,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972886432] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:20,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641679885] [2023-02-18 00:20:20,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:20:20,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:20,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:20,520 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:20,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-02-18 00:20:20,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-18 00:20:20,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:20,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:20:20,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:20,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:21,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641679885] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:21,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:21,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 55 [2023-02-18 00:20:21,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830960948] [2023-02-18 00:20:21,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:21,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-18 00:20:21,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-18 00:20:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2431, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 00:20:21,113 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:22,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:22,193 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2023-02-18 00:20:22,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-18 00:20:22,193 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 00:20:22,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:22,194 INFO L225 Difference]: With dead ends: 265 [2023-02-18 00:20:22,194 INFO L226 Difference]: Without dead ends: 225 [2023-02-18 00:20:22,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 57 SyntacticMatches, 27 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4516 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1765, Invalid=8335, Unknown=0, NotChecked=0, Total=10100 [2023-02-18 00:20:22,194 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 120 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:22,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 323 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-02-18 00:20:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 79. [2023-02-18 00:20:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-18 00:20:22,354 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-18 00:20:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:22,354 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-18 00:20:22,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-18 00:20:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 00:20:22,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:22,355 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:22,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:22,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-02-18 00:20:22,559 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:22,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:22,560 INFO L85 PathProgramCache]: Analyzing trace with hash 762264664, now seen corresponding path program 48 times [2023-02-18 00:20:22,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:22,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448730739] [2023-02-18 00:20:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:22,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:22,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:22,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448730739] [2023-02-18 00:20:22,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448730739] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:22,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902462592] [2023-02-18 00:20:22,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:20:22,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:22,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:22,784 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:22,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-02-18 00:20:22,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-02-18 00:20:22,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:22,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:20:22,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:23,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:23,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902462592] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:23,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:23,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 54 [2023-02-18 00:20:23,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101563302] [2023-02-18 00:20:23,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:23,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-18 00:20:23,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:23,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-18 00:20:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 00:20:23,343 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:24,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:24,620 INFO L93 Difference]: Finished difference Result 312 states and 330 transitions. [2023-02-18 00:20:24,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 00:20:24,620 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 00:20:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:24,621 INFO L225 Difference]: With dead ends: 312 [2023-02-18 00:20:24,621 INFO L226 Difference]: Without dead ends: 272 [2023-02-18 00:20:24,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 57 SyntacticMatches, 28 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4915 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1968, Invalid=9374, Unknown=0, NotChecked=0, Total=11342 [2023-02-18 00:20:24,622 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:24,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 297 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-18 00:20:24,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 79. [2023-02-18 00:20:24,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:24,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-18 00:20:24,786 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-18 00:20:24,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:24,786 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-18 00:20:24,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-18 00:20:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 00:20:24,786 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:24,786 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:24,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:24,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:24,987 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:24,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:24,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1525915641, now seen corresponding path program 49 times [2023-02-18 00:20:24,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:24,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864772639] [2023-02-18 00:20:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:24,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:25,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:25,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864772639] [2023-02-18 00:20:25,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864772639] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:25,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410518881] [2023-02-18 00:20:25,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:20:25,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:25,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:25,205 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:25,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-02-18 00:20:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:20:25,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:25,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:25,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410518881] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:25,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:25,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2023-02-18 00:20:25,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720048535] [2023-02-18 00:20:25,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:25,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-18 00:20:25,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:25,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-18 00:20:25,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2271, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 00:20:25,752 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:27,218 INFO L93 Difference]: Finished difference Result 358 states and 377 transitions. [2023-02-18 00:20:27,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-18 00:20:27,218 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 00:20:27,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:27,219 INFO L225 Difference]: With dead ends: 358 [2023-02-18 00:20:27,219 INFO L226 Difference]: Without dead ends: 318 [2023-02-18 00:20:27,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 57 SyntacticMatches, 29 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2113, Invalid=10097, Unknown=0, NotChecked=0, Total=12210 [2023-02-18 00:20:27,220 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 192 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:27,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 288 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-02-18 00:20:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 79. [2023-02-18 00:20:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-18 00:20:27,387 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-18 00:20:27,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:27,388 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-18 00:20:27,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:27,388 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-18 00:20:27,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 00:20:27,388 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:27,388 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:27,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2023-02-18 00:20:27,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:27,588 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:27,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:27,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2104738872, now seen corresponding path program 50 times [2023-02-18 00:20:27,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:27,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802121767] [2023-02-18 00:20:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:27,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:27,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:27,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802121767] [2023-02-18 00:20:27,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802121767] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:27,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409897897] [2023-02-18 00:20:27,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:20:27,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:27,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:27,805 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:27,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-02-18 00:20:27,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:20:27,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:20:27,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:28,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:28,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409897897] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:28,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:28,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 52 [2023-02-18 00:20:28,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448517063] [2023-02-18 00:20:28,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:28,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-18 00:20:28,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:28,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-18 00:20:28,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 00:20:28,358 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:30,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:30,000 INFO L93 Difference]: Finished difference Result 403 states and 423 transitions. [2023-02-18 00:20:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-18 00:20:30,000 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 00:20:30,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:30,001 INFO L225 Difference]: With dead ends: 403 [2023-02-18 00:20:30,001 INFO L226 Difference]: Without dead ends: 363 [2023-02-18 00:20:30,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 57 SyntacticMatches, 30 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5312 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2188, Invalid=10468, Unknown=0, NotChecked=0, Total=12656 [2023-02-18 00:20:30,002 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 203 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:30,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 362 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:30,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-02-18 00:20:30,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 79. [2023-02-18 00:20:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-18 00:20:30,173 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-18 00:20:30,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:30,173 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-18 00:20:30,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-18 00:20:30,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 00:20:30,173 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:30,173 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:30,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2023-02-18 00:20:30,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2023-02-18 00:20:30,374 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:30,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1984863257, now seen corresponding path program 51 times [2023-02-18 00:20:30,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:30,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028806114] [2023-02-18 00:20:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:30,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:30,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:30,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028806114] [2023-02-18 00:20:30,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028806114] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:30,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91652967] [2023-02-18 00:20:30,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:20:30,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:30,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:30,591 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:30,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-02-18 00:20:30,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-18 00:20:30,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:30,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:20:30,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:30,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:31,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91652967] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:31,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:31,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 51 [2023-02-18 00:20:31,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635771643] [2023-02-18 00:20:31,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:31,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-18 00:20:31,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-18 00:20:31,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2103, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 00:20:31,172 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:32,904 INFO L93 Difference]: Finished difference Result 447 states and 468 transitions. [2023-02-18 00:20:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-18 00:20:32,904 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 00:20:32,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:32,905 INFO L225 Difference]: With dead ends: 447 [2023-02-18 00:20:32,905 INFO L226 Difference]: Without dead ends: 407 [2023-02-18 00:20:32,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 57 SyntacticMatches, 31 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5270 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2187, Invalid=10469, Unknown=0, NotChecked=0, Total=12656 [2023-02-18 00:20:32,905 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 332 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:32,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 242 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-02-18 00:20:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 79. [2023-02-18 00:20:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-18 00:20:33,079 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-18 00:20:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:33,079 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-18 00:20:33,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-18 00:20:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 00:20:33,079 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:33,080 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:33,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2023-02-18 00:20:33,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:33,280 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:33,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash 179880984, now seen corresponding path program 52 times [2023-02-18 00:20:33,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:33,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46628703] [2023-02-18 00:20:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:33,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:33,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:33,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46628703] [2023-02-18 00:20:33,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46628703] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:33,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321632492] [2023-02-18 00:20:33,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:20:33,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:33,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:33,494 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:33,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-02-18 00:20:33,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:20:33,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:20:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:33,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:34,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321632492] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:34,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:34,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 50 [2023-02-18 00:20:34,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555225591] [2023-02-18 00:20:34,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:34,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 00:20:34,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:34,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 00:20:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 00:20:34,036 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:35,890 INFO L93 Difference]: Finished difference Result 490 states and 512 transitions. [2023-02-18 00:20:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-18 00:20:35,890 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 00:20:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:35,891 INFO L225 Difference]: With dead ends: 490 [2023-02-18 00:20:35,891 INFO L226 Difference]: Without dead ends: 450 [2023-02-18 00:20:35,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 57 SyntacticMatches, 32 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5057 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2110, Invalid=10100, Unknown=0, NotChecked=0, Total=12210 [2023-02-18 00:20:35,892 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 318 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:35,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 300 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-02-18 00:20:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 79. [2023-02-18 00:20:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-18 00:20:36,069 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-18 00:20:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:36,069 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-18 00:20:36,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-18 00:20:36,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 00:20:36,069 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:36,069 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:36,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:36,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:36,272 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:36,272 INFO L85 PathProgramCache]: Analyzing trace with hash -293986247, now seen corresponding path program 53 times [2023-02-18 00:20:36,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:36,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934107029] [2023-02-18 00:20:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:36,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:36,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:36,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934107029] [2023-02-18 00:20:36,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934107029] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:36,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197799570] [2023-02-18 00:20:36,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:20:36,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:36,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:36,500 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:36,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-02-18 00:20:36,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-18 00:20:36,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:36,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:20:36,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:36,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:37,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197799570] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:37,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:37,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 49 [2023-02-18 00:20:37,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503145602] [2023-02-18 00:20:37,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:37,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 00:20:37,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:37,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 00:20:37,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1927, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 00:20:37,042 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:38,985 INFO L93 Difference]: Finished difference Result 532 states and 555 transitions. [2023-02-18 00:20:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-18 00:20:38,985 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 00:20:38,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:38,986 INFO L225 Difference]: With dead ends: 532 [2023-02-18 00:20:38,986 INFO L226 Difference]: Without dead ends: 492 [2023-02-18 00:20:38,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 57 SyntacticMatches, 33 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4675 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1963, Invalid=9379, Unknown=0, NotChecked=0, Total=11342 [2023-02-18 00:20:38,987 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 424 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:38,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 278 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-02-18 00:20:39,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 79. [2023-02-18 00:20:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-18 00:20:39,171 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-18 00:20:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:39,171 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-18 00:20:39,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-18 00:20:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 00:20:39,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:39,172 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:39,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2023-02-18 00:20:39,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:39,372 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:39,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:39,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1694745608, now seen corresponding path program 54 times [2023-02-18 00:20:39,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:39,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943199041] [2023-02-18 00:20:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:39,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:39,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:39,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943199041] [2023-02-18 00:20:39,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943199041] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:39,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733422790] [2023-02-18 00:20:39,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:20:39,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:39,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:39,595 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:39,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-02-18 00:20:39,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-02-18 00:20:39,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:39,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:20:39,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:39,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:40,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733422790] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:40,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:40,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2023-02-18 00:20:40,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007265244] [2023-02-18 00:20:40,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:40,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 00:20:40,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:40,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 00:20:40,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 00:20:40,112 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:42,134 INFO L93 Difference]: Finished difference Result 573 states and 597 transitions. [2023-02-18 00:20:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-18 00:20:42,135 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 00:20:42,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:42,136 INFO L225 Difference]: With dead ends: 573 [2023-02-18 00:20:42,136 INFO L226 Difference]: Without dead ends: 533 [2023-02-18 00:20:42,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 57 SyntacticMatches, 34 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1758, Invalid=8342, Unknown=0, NotChecked=0, Total=10100 [2023-02-18 00:20:42,136 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 415 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:42,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 336 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:42,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-02-18 00:20:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 79. [2023-02-18 00:20:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-18 00:20:42,321 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-18 00:20:42,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:42,321 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-18 00:20:42,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-18 00:20:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 00:20:42,322 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:42,322 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:42,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:42,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:42,523 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1308109913, now seen corresponding path program 55 times [2023-02-18 00:20:42,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:42,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98659763] [2023-02-18 00:20:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:42,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:42,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:42,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98659763] [2023-02-18 00:20:42,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98659763] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:42,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433910667] [2023-02-18 00:20:42,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:20:42,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:42,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:42,742 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:42,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-02-18 00:20:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:20:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:43,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:43,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433910667] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:43,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:43,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2023-02-18 00:20:43,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132570020] [2023-02-18 00:20:43,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:43,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 00:20:43,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:43,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 00:20:43,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 00:20:43,268 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:45,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:45,361 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2023-02-18 00:20:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 00:20:45,362 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 00:20:45,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:45,363 INFO L225 Difference]: With dead ends: 613 [2023-02-18 00:20:45,363 INFO L226 Difference]: Without dead ends: 573 [2023-02-18 00:20:45,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 57 SyntacticMatches, 35 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3446 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1513, Invalid=7043, Unknown=0, NotChecked=0, Total=8556 [2023-02-18 00:20:45,363 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 364 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:45,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 359 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:45,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2023-02-18 00:20:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 79. [2023-02-18 00:20:45,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-18 00:20:45,553 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-18 00:20:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:45,553 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-18 00:20:45,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-18 00:20:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 00:20:45,553 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:45,553 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:45,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2023-02-18 00:20:45,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:45,754 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:45,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:45,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1266428888, now seen corresponding path program 11 times [2023-02-18 00:20:45,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:45,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507575566] [2023-02-18 00:20:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:45,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:45,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:45,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507575566] [2023-02-18 00:20:45,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507575566] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:45,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472306506] [2023-02-18 00:20:45,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:20:45,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:45,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:45,976 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:45,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-02-18 00:20:46,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-18 00:20:46,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:46,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:20:46,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:46,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:46,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472306506] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:46,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:46,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2023-02-18 00:20:46,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988267141] [2023-02-18 00:20:46,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:46,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-18 00:20:46,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:46,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-18 00:20:46,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1648, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 00:20:46,488 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:48,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:48,616 INFO L93 Difference]: Finished difference Result 655 states and 682 transitions. [2023-02-18 00:20:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-18 00:20:48,616 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-18 00:20:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:48,618 INFO L225 Difference]: With dead ends: 655 [2023-02-18 00:20:48,618 INFO L226 Difference]: Without dead ends: 615 [2023-02-18 00:20:48,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 57 SyntacticMatches, 36 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1265, Invalid=5541, Unknown=0, NotChecked=0, Total=6806 [2023-02-18 00:20:48,618 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 404 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:48,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 254 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:48,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-02-18 00:20:48,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 81. [2023-02-18 00:20:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1875) internal successors, (95), 80 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2023-02-18 00:20:48,811 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 55 [2023-02-18 00:20:48,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:48,811 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2023-02-18 00:20:48,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2023-02-18 00:20:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 00:20:48,812 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:48,812 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:48,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2023-02-18 00:20:49,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2023-02-18 00:20:49,016 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:49,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash -66956493, now seen corresponding path program 22 times [2023-02-18 00:20:49,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:49,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594921997] [2023-02-18 00:20:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:49,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 55 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:49,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:49,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594921997] [2023-02-18 00:20:49,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594921997] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:49,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271195351] [2023-02-18 00:20:49,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:20:49,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:49,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:49,139 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:49,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-02-18 00:20:49,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:20:49,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:49,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:20:49,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:49,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:49,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271195351] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:49,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:49,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 19 [2023-02-18 00:20:49,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212560953] [2023-02-18 00:20:49,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:49,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 00:20:49,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:49,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 00:20:49,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2023-02-18 00:20:49,422 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:49,765 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2023-02-18 00:20:49,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 00:20:49,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-18 00:20:49,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:49,766 INFO L225 Difference]: With dead ends: 92 [2023-02-18 00:20:49,766 INFO L226 Difference]: Without dead ends: 90 [2023-02-18 00:20:49,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 46 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=701, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 00:20:49,766 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 60 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:49,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 221 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:49,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-18 00:20:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2023-02-18 00:20:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.180722891566265) internal successors, (98), 83 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2023-02-18 00:20:49,975 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 56 [2023-02-18 00:20:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:49,975 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2023-02-18 00:20:49,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2023-02-18 00:20:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:20:49,975 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:49,976 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:49,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:50,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-02-18 00:20:50,176 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:50,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1831214499, now seen corresponding path program 23 times [2023-02-18 00:20:50,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:50,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5408334] [2023-02-18 00:20:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:50,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:50,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:50,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5408334] [2023-02-18 00:20:50,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5408334] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:50,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665515079] [2023-02-18 00:20:50,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:20:50,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:50,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:50,439 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:50,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-02-18 00:20:50,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-18 00:20:50,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:50,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:20:50,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:50,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:51,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665515079] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:51,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:51,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2023-02-18 00:20:51,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486238412] [2023-02-18 00:20:51,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:51,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-18 00:20:51,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:51,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-18 00:20:51,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=2963, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 00:20:51,132 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:51,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:51,941 INFO L93 Difference]: Finished difference Result 181 states and 197 transitions. [2023-02-18 00:20:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 00:20:51,941 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-18 00:20:51,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:51,941 INFO L225 Difference]: With dead ends: 181 [2023-02-18 00:20:51,941 INFO L226 Difference]: Without dead ends: 138 [2023-02-18 00:20:51,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 61 SyntacticMatches, 27 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4031 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1457, Invalid=6375, Unknown=0, NotChecked=0, Total=7832 [2023-02-18 00:20:51,942 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 73 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:51,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 298 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:51,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-18 00:20:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 85. [2023-02-18 00:20:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-18 00:20:52,155 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-18 00:20:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:52,155 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-18 00:20:52,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-18 00:20:52,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:20:52,155 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:52,155 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:52,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2023-02-18 00:20:52,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:52,356 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:52,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:52,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1372411804, now seen corresponding path program 56 times [2023-02-18 00:20:52,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:52,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573932311] [2023-02-18 00:20:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:52,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:52,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:52,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573932311] [2023-02-18 00:20:52,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573932311] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:52,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158341385] [2023-02-18 00:20:52,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:20:52,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:52,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:52,614 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:52,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-02-18 00:20:52,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:20:52,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:52,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:20:52,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:53,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:53,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158341385] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:53,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:53,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 60 [2023-02-18 00:20:53,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363568044] [2023-02-18 00:20:53,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:53,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-18 00:20:53,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:53,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-18 00:20:53,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=2883, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 00:20:53,284 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:54,400 INFO L93 Difference]: Finished difference Result 234 states and 251 transitions. [2023-02-18 00:20:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 00:20:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-18 00:20:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:54,401 INFO L225 Difference]: With dead ends: 234 [2023-02-18 00:20:54,401 INFO L226 Difference]: Without dead ends: 191 [2023-02-18 00:20:54,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 61 SyntacticMatches, 28 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4698 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1750, Invalid=8150, Unknown=0, NotChecked=0, Total=9900 [2023-02-18 00:20:54,402 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 105 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:54,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 273 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:54,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-02-18 00:20:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 85. [2023-02-18 00:20:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-18 00:20:54,628 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-18 00:20:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:54,628 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-18 00:20:54,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-18 00:20:54,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:20:54,629 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:54,629 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:54,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:54,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:54,834 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:54,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:54,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1710834051, now seen corresponding path program 57 times [2023-02-18 00:20:54,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:54,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446279921] [2023-02-18 00:20:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:54,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:55,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446279921] [2023-02-18 00:20:55,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446279921] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795310813] [2023-02-18 00:20:55,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:20:55,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:55,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:55,089 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:55,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2023-02-18 00:20:55,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-02-18 00:20:55,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:55,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:20:55,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:55,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:55,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795310813] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:55,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:55,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 59 [2023-02-18 00:20:55,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239926713] [2023-02-18 00:20:55,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:55,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 00:20:55,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:55,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 00:20:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2801, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 00:20:55,770 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:57,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:57,228 INFO L93 Difference]: Finished difference Result 286 states and 304 transitions. [2023-02-18 00:20:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-18 00:20:57,228 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-18 00:20:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:57,229 INFO L225 Difference]: With dead ends: 286 [2023-02-18 00:20:57,229 INFO L226 Difference]: Without dead ends: 243 [2023-02-18 00:20:57,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 61 SyntacticMatches, 29 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5316 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2046, Invalid=9726, Unknown=0, NotChecked=0, Total=11772 [2023-02-18 00:20:57,230 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 187 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:57,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 394 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:20:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-02-18 00:20:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 85. [2023-02-18 00:20:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-18 00:20:57,461 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-18 00:20:57,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:57,461 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-18 00:20:57,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:57,461 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-18 00:20:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:20:57,461 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:57,461 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:57,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2023-02-18 00:20:57,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:57,662 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:57,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:57,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1099200380, now seen corresponding path program 58 times [2023-02-18 00:20:57,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:57,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641198210] [2023-02-18 00:20:57,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:57,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:57,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:57,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641198210] [2023-02-18 00:20:57,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641198210] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:57,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035157054] [2023-02-18 00:20:57,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:20:57,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:57,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:57,917 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:20:57,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2023-02-18 00:20:57,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:20:57,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:57,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:20:57,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:58,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:58,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035157054] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:58,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:58,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 58 [2023-02-18 00:20:58,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519179800] [2023-02-18 00:20:58,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:58,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-18 00:20:58,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:58,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-18 00:20:58,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=2717, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 00:20:58,566 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:00,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:00,273 INFO L93 Difference]: Finished difference Result 337 states and 356 transitions. [2023-02-18 00:21:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-18 00:21:00,273 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-18 00:21:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:00,274 INFO L225 Difference]: With dead ends: 337 [2023-02-18 00:21:00,274 INFO L226 Difference]: Without dead ends: 294 [2023-02-18 00:21:00,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 61 SyntacticMatches, 30 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5836 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2304, Invalid=11036, Unknown=0, NotChecked=0, Total=13340 [2023-02-18 00:21:00,275 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 217 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:00,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 223 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:00,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-02-18 00:21:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 85. [2023-02-18 00:21:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-18 00:21:00,514 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-18 00:21:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:00,514 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-18 00:21:00,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-18 00:21:00,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:21:00,514 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:00,514 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:00,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2023-02-18 00:21:00,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:00,715 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:00,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:00,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1996741987, now seen corresponding path program 59 times [2023-02-18 00:21:00,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:00,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155953445] [2023-02-18 00:21:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:00,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:00,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:00,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155953445] [2023-02-18 00:21:00,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155953445] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:00,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727985910] [2023-02-18 00:21:00,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:21:00,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:00,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:00,969 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:00,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2023-02-18 00:21:01,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-18 00:21:01,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:01,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:21:01,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:01,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:01,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727985910] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:01,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:01,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2023-02-18 00:21:01,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69744380] [2023-02-18 00:21:01,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:01,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-18 00:21:01,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:01,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-18 00:21:01,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 00:21:01,610 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:03,624 INFO L93 Difference]: Finished difference Result 387 states and 407 transitions. [2023-02-18 00:21:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-18 00:21:03,624 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-18 00:21:03,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:03,625 INFO L225 Difference]: With dead ends: 387 [2023-02-18 00:21:03,625 INFO L226 Difference]: Without dead ends: 344 [2023-02-18 00:21:03,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 61 SyntacticMatches, 31 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6228 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2503, Invalid=12017, Unknown=0, NotChecked=0, Total=14520 [2023-02-18 00:21:03,626 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 229 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:03,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 338 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:03,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-02-18 00:21:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 85. [2023-02-18 00:21:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-18 00:21:03,872 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-18 00:21:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:03,872 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-18 00:21:03,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-18 00:21:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:21:03,873 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:03,873 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:03,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2023-02-18 00:21:04,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:04,073 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:04,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:04,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1782714204, now seen corresponding path program 60 times [2023-02-18 00:21:04,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:04,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981743305] [2023-02-18 00:21:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:04,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:04,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:04,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981743305] [2023-02-18 00:21:04,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981743305] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:04,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756744172] [2023-02-18 00:21:04,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:21:04,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:04,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:04,329 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:04,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2023-02-18 00:21:04,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-18 00:21:04,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:04,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:21:04,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:04,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:04,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756744172] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:04,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:04,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 56 [2023-02-18 00:21:04,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717213288] [2023-02-18 00:21:04,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:04,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-18 00:21:04,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:04,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-18 00:21:04,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 00:21:04,954 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:07,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:07,153 INFO L93 Difference]: Finished difference Result 436 states and 457 transitions. [2023-02-18 00:21:07,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-02-18 00:21:07,153 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-18 00:21:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:07,154 INFO L225 Difference]: With dead ends: 436 [2023-02-18 00:21:07,154 INFO L226 Difference]: Without dead ends: 393 [2023-02-18 00:21:07,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 61 SyntacticMatches, 32 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6460 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2628, Invalid=12624, Unknown=0, NotChecked=0, Total=15252 [2023-02-18 00:21:07,155 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 309 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:07,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 240 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-02-18 00:21:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 85. [2023-02-18 00:21:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-18 00:21:07,405 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-18 00:21:07,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:07,405 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-18 00:21:07,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-18 00:21:07,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:21:07,406 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:07,406 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:07,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2023-02-18 00:21:07,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2023-02-18 00:21:07,606 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:07,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:07,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1211895485, now seen corresponding path program 61 times [2023-02-18 00:21:07,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:07,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146883785] [2023-02-18 00:21:07,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:07,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 188 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:07,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:07,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146883785] [2023-02-18 00:21:07,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146883785] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:07,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809592913] [2023-02-18 00:21:07,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:21:07,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:07,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:07,851 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:07,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2023-02-18 00:21:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:07,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:21:07,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:08,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:08,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809592913] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:08,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:08,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 55 [2023-02-18 00:21:08,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186019452] [2023-02-18 00:21:08,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:08,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-18 00:21:08,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:08,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-18 00:21:08,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 00:21:08,484 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:10,902 INFO L93 Difference]: Finished difference Result 484 states and 506 transitions. [2023-02-18 00:21:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-18 00:21:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-18 00:21:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:10,903 INFO L225 Difference]: With dead ends: 484 [2023-02-18 00:21:10,903 INFO L226 Difference]: Without dead ends: 441 [2023-02-18 00:21:10,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 61 SyntacticMatches, 33 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6512 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2670, Invalid=12830, Unknown=0, NotChecked=0, Total=15500 [2023-02-18 00:21:10,904 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 331 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:10,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 329 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-02-18 00:21:11,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 85. [2023-02-18 00:21:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-18 00:21:11,156 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-18 00:21:11,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:11,156 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-18 00:21:11,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-18 00:21:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:21:11,156 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:11,156 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:11,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2023-02-18 00:21:11,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:11,357 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:11,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:11,357 INFO L85 PathProgramCache]: Analyzing trace with hash -884728004, now seen corresponding path program 62 times [2023-02-18 00:21:11,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:11,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843303830] [2023-02-18 00:21:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:11,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:11,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:11,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843303830] [2023-02-18 00:21:11,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843303830] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:11,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305575792] [2023-02-18 00:21:11,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:21:11,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:11,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:11,604 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:11,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2023-02-18 00:21:11,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:21:11,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:11,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:21:11,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:11,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:12,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305575792] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:12,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:12,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 54 [2023-02-18 00:21:12,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8694443] [2023-02-18 00:21:12,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:12,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-18 00:21:12,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:12,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-18 00:21:12,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 00:21:12,206 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:14,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:14,820 INFO L93 Difference]: Finished difference Result 531 states and 554 transitions. [2023-02-18 00:21:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-02-18 00:21:14,820 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-18 00:21:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:14,821 INFO L225 Difference]: With dead ends: 531 [2023-02-18 00:21:14,821 INFO L226 Difference]: Without dead ends: 488 [2023-02-18 00:21:14,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 61 SyntacticMatches, 34 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6375 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2626, Invalid=12626, Unknown=0, NotChecked=0, Total=15252 [2023-02-18 00:21:14,822 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 333 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:14,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 359 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:21:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-02-18 00:21:15,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 85. [2023-02-18 00:21:15,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-18 00:21:15,078 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-18 00:21:15,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:15,078 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-18 00:21:15,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:15,078 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-18 00:21:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:21:15,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:15,078 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:15,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2023-02-18 00:21:15,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:15,279 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash -121077027, now seen corresponding path program 63 times [2023-02-18 00:21:15,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:15,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995638862] [2023-02-18 00:21:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:15,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:15,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:15,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995638862] [2023-02-18 00:21:15,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995638862] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:15,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050067265] [2023-02-18 00:21:15,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:21:15,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:15,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:15,524 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:15,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2023-02-18 00:21:15,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-02-18 00:21:15,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:15,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:21:15,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:15,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:16,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050067265] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:16,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:16,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 53 [2023-02-18 00:21:16,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882724521] [2023-02-18 00:21:16,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:16,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-18 00:21:16,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:16,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-18 00:21:16,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 00:21:16,130 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:18,865 INFO L93 Difference]: Finished difference Result 577 states and 601 transitions. [2023-02-18 00:21:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-18 00:21:18,866 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-18 00:21:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:18,867 INFO L225 Difference]: With dead ends: 577 [2023-02-18 00:21:18,867 INFO L226 Difference]: Without dead ends: 534 [2023-02-18 00:21:18,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 61 SyntacticMatches, 35 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6046 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2499, Invalid=12021, Unknown=0, NotChecked=0, Total=14520 [2023-02-18 00:21:18,867 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 417 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:18,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 333 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-02-18 00:21:19,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 85. [2023-02-18 00:21:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-18 00:21:19,126 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-18 00:21:19,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:19,126 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-18 00:21:19,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-18 00:21:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:21:19,127 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:19,127 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:19,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2023-02-18 00:21:19,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2023-02-18 00:21:19,331 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:19,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:19,331 INFO L85 PathProgramCache]: Analyzing trace with hash 457746204, now seen corresponding path program 64 times [2023-02-18 00:21:19,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:19,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883150942] [2023-02-18 00:21:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:19,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:19,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:19,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883150942] [2023-02-18 00:21:19,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883150942] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:19,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445504011] [2023-02-18 00:21:19,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:21:19,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:19,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:19,578 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:19,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2023-02-18 00:21:19,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:21:19,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:19,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:21:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:19,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:20,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445504011] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:20,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:20,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 52 [2023-02-18 00:21:20,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086061504] [2023-02-18 00:21:20,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:20,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-18 00:21:20,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:20,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-18 00:21:20,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 00:21:20,160 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:23,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:23,022 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2023-02-18 00:21:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-02-18 00:21:23,022 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-18 00:21:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:23,023 INFO L225 Difference]: With dead ends: 622 [2023-02-18 00:21:23,023 INFO L226 Difference]: Without dead ends: 579 [2023-02-18 00:21:23,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 61 SyntacticMatches, 36 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5533 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2298, Invalid=11042, Unknown=0, NotChecked=0, Total=13340 [2023-02-18 00:21:23,024 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 517 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:23,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 319 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-02-18 00:21:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 85. [2023-02-18 00:21:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-18 00:21:23,290 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-18 00:21:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:23,290 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-18 00:21:23,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-18 00:21:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:21:23,291 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:23,291 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:23,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2023-02-18 00:21:23,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:23,491 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash 337870589, now seen corresponding path program 65 times [2023-02-18 00:21:23,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:23,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341878590] [2023-02-18 00:21:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:23,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:23,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:23,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341878590] [2023-02-18 00:21:23,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341878590] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:23,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154780892] [2023-02-18 00:21:23,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:21:23,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:23,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:23,745 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:23,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2023-02-18 00:21:23,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-18 00:21:23,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:23,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:21:23,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:24,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:24,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154780892] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:24,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:24,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2023-02-18 00:21:24,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889106535] [2023-02-18 00:21:24,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:24,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-18 00:21:24,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:24,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-18 00:21:24,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 00:21:24,332 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:27,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:27,288 INFO L93 Difference]: Finished difference Result 666 states and 692 transitions. [2023-02-18 00:21:27,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-18 00:21:27,288 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-18 00:21:27,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:27,289 INFO L225 Difference]: With dead ends: 666 [2023-02-18 00:21:27,289 INFO L226 Difference]: Without dead ends: 623 [2023-02-18 00:21:27,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 61 SyntacticMatches, 37 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4856 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2038, Invalid=9734, Unknown=0, NotChecked=0, Total=11772 [2023-02-18 00:21:27,290 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 424 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:27,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 346 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-02-18 00:21:27,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 85. [2023-02-18 00:21:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-18 00:21:27,564 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-18 00:21:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:27,564 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-18 00:21:27,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-18 00:21:27,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:21:27,564 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:27,565 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:27,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2023-02-18 00:21:27,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:27,765 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:27,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:27,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1467111684, now seen corresponding path program 66 times [2023-02-18 00:21:27,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:27,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966461848] [2023-02-18 00:21:27,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:27,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:28,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:28,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966461848] [2023-02-18 00:21:28,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966461848] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:28,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114780916] [2023-02-18 00:21:28,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:21:28,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:28,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:28,015 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:28,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2023-02-18 00:21:28,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-18 00:21:28,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:28,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:21:28,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:28,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:28,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114780916] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:28,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:28,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2023-02-18 00:21:28,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919191442] [2023-02-18 00:21:28,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:28,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 00:21:28,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:28,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 00:21:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 00:21:28,618 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:31,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:31,692 INFO L93 Difference]: Finished difference Result 709 states and 736 transitions. [2023-02-18 00:21:31,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-18 00:21:31,692 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-18 00:21:31,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:31,693 INFO L225 Difference]: With dead ends: 709 [2023-02-18 00:21:31,693 INFO L226 Difference]: Without dead ends: 666 [2023-02-18 00:21:31,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 61 SyntacticMatches, 38 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4019 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1740, Invalid=8160, Unknown=0, NotChecked=0, Total=9900 [2023-02-18 00:21:31,694 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 453 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:31,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 328 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2023-02-18 00:21:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 85. [2023-02-18 00:21:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-18 00:21:31,967 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-18 00:21:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:31,968 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-18 00:21:31,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-18 00:21:31,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:21:31,968 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:31,968 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:31,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2023-02-18 00:21:32,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2023-02-18 00:21:32,171 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:32,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:32,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1940978915, now seen corresponding path program 12 times [2023-02-18 00:21:32,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:32,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904591114] [2023-02-18 00:21:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:32,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:32,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:32,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904591114] [2023-02-18 00:21:32,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904591114] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:32,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945922352] [2023-02-18 00:21:32,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:21:32,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:32,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:32,419 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:32,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2023-02-18 00:21:32,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-18 00:21:32,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:21:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:32,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:33,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945922352] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:33,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:33,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 49 [2023-02-18 00:21:33,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584679181] [2023-02-18 00:21:33,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:33,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 00:21:33,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:33,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 00:21:33,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1871, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 00:21:33,006 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:36,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:36,138 INFO L93 Difference]: Finished difference Result 754 states and 783 transitions. [2023-02-18 00:21:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-18 00:21:36,138 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-18 00:21:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:36,139 INFO L225 Difference]: With dead ends: 754 [2023-02-18 00:21:36,139 INFO L226 Difference]: Without dead ends: 711 [2023-02-18 00:21:36,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 61 SyntacticMatches, 39 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1445, Invalid=6387, Unknown=0, NotChecked=0, Total=7832 [2023-02-18 00:21:36,140 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 504 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:36,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 286 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2023-02-18 00:21:36,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 87. [2023-02-18 00:21:36,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.186046511627907) internal successors, (102), 86 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:36,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2023-02-18 00:21:36,420 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 59 [2023-02-18 00:21:36,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:36,420 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2023-02-18 00:21:36,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2023-02-18 00:21:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 00:21:36,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:36,421 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:36,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2023-02-18 00:21:36,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2023-02-18 00:21:36,626 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:36,627 INFO L85 PathProgramCache]: Analyzing trace with hash -794122025, now seen corresponding path program 24 times [2023-02-18 00:21:36,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:36,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214522860] [2023-02-18 00:21:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:36,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 66 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:36,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:36,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214522860] [2023-02-18 00:21:36,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214522860] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:36,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975216908] [2023-02-18 00:21:36,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:21:36,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:36,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:36,780 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:36,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2023-02-18 00:21:36,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-18 00:21:36,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:36,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:21:36,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:36,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:37,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975216908] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:37,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:37,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 20 [2023-02-18 00:21:37,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650029270] [2023-02-18 00:21:37,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:37,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 00:21:37,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 00:21:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2023-02-18 00:21:37,119 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:37,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:37,573 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2023-02-18 00:21:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 00:21:37,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-02-18 00:21:37,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:37,573 INFO L225 Difference]: With dead ends: 98 [2023-02-18 00:21:37,574 INFO L226 Difference]: Without dead ends: 96 [2023-02-18 00:21:37,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 79 SyntacticMatches, 50 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=788, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 00:21:37,574 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 88 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:37,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 245 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-18 00:21:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2023-02-18 00:21:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2023-02-18 00:21:37,860 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 60 [2023-02-18 00:21:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:37,860 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2023-02-18 00:21:37,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2023-02-18 00:21:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:21:37,860 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:37,860 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:37,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2023-02-18 00:21:38,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2023-02-18 00:21:38,061 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1004537287, now seen corresponding path program 25 times [2023-02-18 00:21:38,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:38,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439690246] [2023-02-18 00:21:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:38,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:38,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:38,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439690246] [2023-02-18 00:21:38,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439690246] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:38,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129975373] [2023-02-18 00:21:38,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:21:38,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:38,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:38,361 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:38,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2023-02-18 00:21:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:38,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:21:38,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:38,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:39,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129975373] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:39,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:39,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2023-02-18 00:21:39,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992542942] [2023-02-18 00:21:39,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:39,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-18 00:21:39,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:39,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-18 00:21:39,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3369, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 00:21:39,131 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:40,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:40,142 INFO L93 Difference]: Finished difference Result 194 states and 211 transitions. [2023-02-18 00:21:40,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 00:21:40,142 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:21:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:40,142 INFO L225 Difference]: With dead ends: 194 [2023-02-18 00:21:40,142 INFO L226 Difference]: Without dead ends: 148 [2023-02-18 00:21:40,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 65 SyntacticMatches, 29 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1650, Invalid=7280, Unknown=0, NotChecked=0, Total=8930 [2023-02-18 00:21:40,143 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:40,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 191 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-18 00:21:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 91. [2023-02-18 00:21:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:40,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-18 00:21:40,459 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-18 00:21:40,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:40,459 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-18 00:21:40,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:40,460 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-18 00:21:40,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:21:40,460 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:40,460 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:40,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2023-02-18 00:21:40,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:40,660 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1170782200, now seen corresponding path program 67 times [2023-02-18 00:21:40,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:40,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138833244] [2023-02-18 00:21:40,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:40,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:40,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:40,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138833244] [2023-02-18 00:21:40,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138833244] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:40,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731747650] [2023-02-18 00:21:40,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:21:40,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:40,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:40,973 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:40,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2023-02-18 00:21:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:41,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:21:41,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:41,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:41,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731747650] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:41,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:41,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2023-02-18 00:21:41,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062641824] [2023-02-18 00:21:41,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:41,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-18 00:21:41,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:41,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-18 00:21:41,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=3284, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 00:21:41,725 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:43,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:43,224 INFO L93 Difference]: Finished difference Result 251 states and 269 transitions. [2023-02-18 00:21:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-18 00:21:43,224 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:21:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:43,225 INFO L225 Difference]: With dead ends: 251 [2023-02-18 00:21:43,225 INFO L226 Difference]: Without dead ends: 205 [2023-02-18 00:21:43,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 65 SyntacticMatches, 30 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5432 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1994, Invalid=9348, Unknown=0, NotChecked=0, Total=11342 [2023-02-18 00:21:43,225 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:43,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 336 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-18 00:21:43,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 91. [2023-02-18 00:21:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-18 00:21:43,556 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-18 00:21:43,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:43,557 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-18 00:21:43,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:43,557 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-18 00:21:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:21:43,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:43,557 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:43,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2023-02-18 00:21:43,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2023-02-18 00:21:43,762 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:43,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1933690457, now seen corresponding path program 68 times [2023-02-18 00:21:43,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:43,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426549155] [2023-02-18 00:21:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:43,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:44,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:44,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426549155] [2023-02-18 00:21:44,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426549155] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:44,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103749591] [2023-02-18 00:21:44,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:21:44,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:44,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:44,053 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:44,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2023-02-18 00:21:44,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:21:44,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:44,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:21:44,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:44,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:44,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103749591] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:44,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:44,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 63 [2023-02-18 00:21:44,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283825325] [2023-02-18 00:21:44,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:44,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-18 00:21:44,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:44,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-18 00:21:44,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=3197, Unknown=0, NotChecked=0, Total=3906 [2023-02-18 00:21:44,787 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:46,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:46,754 INFO L93 Difference]: Finished difference Result 307 states and 326 transitions. [2023-02-18 00:21:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 00:21:46,755 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:21:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:46,755 INFO L225 Difference]: With dead ends: 307 [2023-02-18 00:21:46,755 INFO L226 Difference]: Without dead ends: 261 [2023-02-18 00:21:46,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 65 SyntacticMatches, 31 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6181 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2348, Invalid=11224, Unknown=0, NotChecked=0, Total=13572 [2023-02-18 00:21:46,756 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 194 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:46,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 373 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:21:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-02-18 00:21:47,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 91. [2023-02-18 00:21:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-18 00:21:47,097 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-18 00:21:47,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:47,097 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-18 00:21:47,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-18 00:21:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:21:47,097 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:47,097 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:47,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2023-02-18 00:21:47,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2023-02-18 00:21:47,297 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:47,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1127016408, now seen corresponding path program 69 times [2023-02-18 00:21:47,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:47,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014926098] [2023-02-18 00:21:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:47,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:47,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:47,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014926098] [2023-02-18 00:21:47,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014926098] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:47,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036835737] [2023-02-18 00:21:47,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:21:47,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:47,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:47,579 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:47,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2023-02-18 00:21:47,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-02-18 00:21:47,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:47,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:21:47,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:48,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:48,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036835737] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:48,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:48,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2023-02-18 00:21:48,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307144103] [2023-02-18 00:21:48,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:48,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-18 00:21:48,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:48,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-18 00:21:48,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=3108, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 00:21:48,310 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:50,639 INFO L93 Difference]: Finished difference Result 362 states and 382 transitions. [2023-02-18 00:21:50,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-18 00:21:50,639 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:21:50,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:50,639 INFO L225 Difference]: With dead ends: 362 [2023-02-18 00:21:50,639 INFO L226 Difference]: Without dead ends: 316 [2023-02-18 00:21:50,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 65 SyntacticMatches, 32 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6836 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2667, Invalid=12833, Unknown=0, NotChecked=0, Total=15500 [2023-02-18 00:21:50,640 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 204 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:50,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 297 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:50,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-02-18 00:21:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 91. [2023-02-18 00:21:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-18 00:21:50,987 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-18 00:21:50,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:50,987 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-18 00:21:50,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-18 00:21:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:21:50,988 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:50,988 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:50,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2023-02-18 00:21:51,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:51,188 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:51,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:51,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1655183993, now seen corresponding path program 70 times [2023-02-18 00:21:51,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:51,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197719055] [2023-02-18 00:21:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:51,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:51,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:51,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197719055] [2023-02-18 00:21:51,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197719055] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:51,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314176703] [2023-02-18 00:21:51,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:21:51,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:51,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:51,476 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:51,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2023-02-18 00:21:51,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:21:51,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:51,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:21:51,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:51,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:52,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314176703] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:52,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:52,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2023-02-18 00:21:52,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783660658] [2023-02-18 00:21:52,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:52,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-18 00:21:52,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:52,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-18 00:21:52,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=3017, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 00:21:52,184 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:54,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:54,881 INFO L93 Difference]: Finished difference Result 416 states and 437 transitions. [2023-02-18 00:21:54,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-18 00:21:54,882 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:21:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:54,882 INFO L225 Difference]: With dead ends: 416 [2023-02-18 00:21:54,882 INFO L226 Difference]: Without dead ends: 370 [2023-02-18 00:21:54,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 65 SyntacticMatches, 33 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7362 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2927, Invalid=14103, Unknown=0, NotChecked=0, Total=17030 [2023-02-18 00:21:54,883 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 246 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:54,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 269 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-02-18 00:21:55,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 91. [2023-02-18 00:21:55,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-18 00:21:55,236 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-18 00:21:55,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:55,236 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-18 00:21:55,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-18 00:21:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:21:55,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:55,237 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:55,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2023-02-18 00:21:55,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:55,437 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:55,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:55,437 INFO L85 PathProgramCache]: Analyzing trace with hash 563843000, now seen corresponding path program 71 times [2023-02-18 00:21:55,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:55,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290416918] [2023-02-18 00:21:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:55,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:55,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:55,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290416918] [2023-02-18 00:21:55,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290416918] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:55,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191239297] [2023-02-18 00:21:55,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:21:55,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:55,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:55,717 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:21:55,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2023-02-18 00:21:55,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-02-18 00:21:55,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:55,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:21:55,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:56,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:56,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191239297] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:56,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:56,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 60 [2023-02-18 00:21:56,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628836623] [2023-02-18 00:21:56,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:56,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-18 00:21:56,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:56,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-18 00:21:56,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=2924, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 00:21:56,454 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:59,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:59,513 INFO L93 Difference]: Finished difference Result 469 states and 491 transitions. [2023-02-18 00:21:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-18 00:21:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:21:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:59,514 INFO L225 Difference]: With dead ends: 469 [2023-02-18 00:21:59,514 INFO L226 Difference]: Without dead ends: 423 [2023-02-18 00:21:59,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 65 SyntacticMatches, 34 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7721 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3110, Invalid=14980, Unknown=0, NotChecked=0, Total=18090 [2023-02-18 00:21:59,515 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 303 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:59,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 377 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:21:59,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-02-18 00:21:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 91. [2023-02-18 00:21:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-18 00:21:59,874 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-18 00:21:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:59,874 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-18 00:21:59,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-18 00:21:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:21:59,874 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:59,874 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:59,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2023-02-18 00:22:00,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2023-02-18 00:22:00,075 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:00,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1775564441, now seen corresponding path program 72 times [2023-02-18 00:22:00,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:00,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902003291] [2023-02-18 00:22:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:00,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:00,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:00,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902003291] [2023-02-18 00:22:00,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902003291] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:00,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943669264] [2023-02-18 00:22:00,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:22:00,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:00,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:00,352 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:22:00,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2023-02-18 00:22:00,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-02-18 00:22:00,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:00,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:22:00,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:00,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:01,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943669264] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:01,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:01,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 59 [2023-02-18 00:22:01,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806144305] [2023-02-18 00:22:01,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:01,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 00:22:01,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:01,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 00:22:01,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=2829, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 00:22:01,064 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:04,390 INFO L93 Difference]: Finished difference Result 521 states and 544 transitions. [2023-02-18 00:22:04,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-02-18 00:22:04,390 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:22:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:04,391 INFO L225 Difference]: With dead ends: 521 [2023-02-18 00:22:04,391 INFO L226 Difference]: Without dead ends: 475 [2023-02-18 00:22:04,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 65 SyntacticMatches, 35 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7887 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3204, Invalid=15428, Unknown=0, NotChecked=0, Total=18632 [2023-02-18 00:22:04,392 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 472 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:04,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 278 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:22:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-02-18 00:22:04,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 91. [2023-02-18 00:22:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:04,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-18 00:22:04,754 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-18 00:22:04,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:04,754 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-18 00:22:04,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:04,754 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-18 00:22:04,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:22:04,754 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:04,754 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:04,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2023-02-18 00:22:04,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:04,954 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:04,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:04,955 INFO L85 PathProgramCache]: Analyzing trace with hash 290631576, now seen corresponding path program 73 times [2023-02-18 00:22:04,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:04,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060822547] [2023-02-18 00:22:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:04,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:05,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:05,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060822547] [2023-02-18 00:22:05,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060822547] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:05,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846141019] [2023-02-18 00:22:05,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:22:05,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:05,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:05,232 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:22:05,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2023-02-18 00:22:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:05,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:22:05,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:05,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:05,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846141019] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:05,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:05,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 58 [2023-02-18 00:22:05,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118047926] [2023-02-18 00:22:05,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:05,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-18 00:22:05,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:05,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-18 00:22:05,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2732, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 00:22:05,906 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:09,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:09,518 INFO L93 Difference]: Finished difference Result 572 states and 596 transitions. [2023-02-18 00:22:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-18 00:22:09,518 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:22:09,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:09,519 INFO L225 Difference]: With dead ends: 572 [2023-02-18 00:22:09,519 INFO L226 Difference]: Without dead ends: 526 [2023-02-18 00:22:09,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 65 SyntacticMatches, 36 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7846 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3203, Invalid=15429, Unknown=0, NotChecked=0, Total=18632 [2023-02-18 00:22:09,520 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 331 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:09,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 350 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:22:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-02-18 00:22:09,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 91. [2023-02-18 00:22:09,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:09,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-18 00:22:09,888 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-18 00:22:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:09,888 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-18 00:22:09,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:09,889 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-18 00:22:09,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:22:09,889 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:09,889 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:09,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2023-02-18 00:22:10,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2023-02-18 00:22:10,089 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:10,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:10,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1489656505, now seen corresponding path program 74 times [2023-02-18 00:22:10,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:10,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006215535] [2023-02-18 00:22:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:10,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:10,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:10,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006215535] [2023-02-18 00:22:10,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006215535] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:10,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465413952] [2023-02-18 00:22:10,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:22:10,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:10,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:10,367 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:22:10,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2023-02-18 00:22:10,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:22:10,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:10,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:22:10,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:10,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:11,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465413952] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:11,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:11,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 57 [2023-02-18 00:22:11,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227767726] [2023-02-18 00:22:11,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:11,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-18 00:22:11,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:11,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-18 00:22:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 00:22:11,039 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:14,794 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2023-02-18 00:22:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-18 00:22:14,795 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:22:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:14,795 INFO L225 Difference]: With dead ends: 622 [2023-02-18 00:22:14,795 INFO L226 Difference]: Without dead ends: 576 [2023-02-18 00:22:14,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 65 SyntacticMatches, 37 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7592 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3107, Invalid=14983, Unknown=0, NotChecked=0, Total=18090 [2023-02-18 00:22:14,796 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 390 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:14,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 280 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:22:14,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2023-02-18 00:22:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 91. [2023-02-18 00:22:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-18 00:22:15,170 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-18 00:22:15,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:15,170 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-18 00:22:15,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-18 00:22:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:22:15,171 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:15,171 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:15,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2023-02-18 00:22:15,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2023-02-18 00:22:15,372 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:15,372 INFO L85 PathProgramCache]: Analyzing trace with hash 974145400, now seen corresponding path program 75 times [2023-02-18 00:22:15,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:15,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805462895] [2023-02-18 00:22:15,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:15,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:15,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:15,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805462895] [2023-02-18 00:22:15,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805462895] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:15,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559708166] [2023-02-18 00:22:15,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:22:15,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:15,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:15,648 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:22:15,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2023-02-18 00:22:15,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-02-18 00:22:15,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:15,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:22:15,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:16,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:16,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559708166] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:16,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:16,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 56 [2023-02-18 00:22:16,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611238870] [2023-02-18 00:22:16,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:16,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-18 00:22:16,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:16,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-18 00:22:16,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 00:22:16,309 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:20,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:20,269 INFO L93 Difference]: Finished difference Result 671 states and 697 transitions. [2023-02-18 00:22:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-02-18 00:22:20,269 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:22:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:20,270 INFO L225 Difference]: With dead ends: 671 [2023-02-18 00:22:20,270 INFO L226 Difference]: Without dead ends: 625 [2023-02-18 00:22:20,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 65 SyntacticMatches, 38 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2922, Invalid=14108, Unknown=0, NotChecked=0, Total=17030 [2023-02-18 00:22:20,271 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 456 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:20,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 296 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:22:20,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-02-18 00:22:20,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 91. [2023-02-18 00:22:20,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-18 00:22:20,652 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-18 00:22:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:20,652 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-18 00:22:20,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-18 00:22:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:22:20,653 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:20,653 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:20,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2023-02-18 00:22:20,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:20,858 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:20,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:20,858 INFO L85 PathProgramCache]: Analyzing trace with hash 403326681, now seen corresponding path program 76 times [2023-02-18 00:22:20,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:20,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917090953] [2023-02-18 00:22:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:20,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:21,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:21,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917090953] [2023-02-18 00:22:21,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917090953] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:21,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33940434] [2023-02-18 00:22:21,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:22:21,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:21,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:21,137 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:22:21,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2023-02-18 00:22:21,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:22:21,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:21,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:22:21,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:21,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:21,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33940434] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:21,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:21,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 55 [2023-02-18 00:22:21,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317408319] [2023-02-18 00:22:21,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:21,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-18 00:22:21,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:21,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-18 00:22:21,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 00:22:21,802 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:25,982 INFO L93 Difference]: Finished difference Result 719 states and 746 transitions. [2023-02-18 00:22:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-18 00:22:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:22:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:25,989 INFO L225 Difference]: With dead ends: 719 [2023-02-18 00:22:25,989 INFO L226 Difference]: Without dead ends: 673 [2023-02-18 00:22:25,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 65 SyntacticMatches, 39 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6465 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2660, Invalid=12840, Unknown=0, NotChecked=0, Total=15500 [2023-02-18 00:22:25,990 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 470 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:25,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 362 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:22:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2023-02-18 00:22:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 91. [2023-02-18 00:22:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-18 00:22:26,377 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-18 00:22:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:26,377 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-18 00:22:26,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-18 00:22:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:22:26,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:26,381 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:26,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2023-02-18 00:22:26,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2023-02-18 00:22:26,586 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:26,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:26,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1693296808, now seen corresponding path program 77 times [2023-02-18 00:22:26,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:26,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642867725] [2023-02-18 00:22:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:26,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:26,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:26,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642867725] [2023-02-18 00:22:26,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642867725] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:26,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510129728] [2023-02-18 00:22:26,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:22:26,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:26,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:26,866 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:22:26,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2023-02-18 00:22:26,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-02-18 00:22:26,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:26,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:22:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:27,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:27,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510129728] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:27,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:27,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 54 [2023-02-18 00:22:27,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6685150] [2023-02-18 00:22:27,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:27,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-18 00:22:27,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:27,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-18 00:22:27,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2324, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 00:22:27,528 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:31,818 INFO L93 Difference]: Finished difference Result 766 states and 794 transitions. [2023-02-18 00:22:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-18 00:22:31,818 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:22:31,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:31,819 INFO L225 Difference]: With dead ends: 766 [2023-02-18 00:22:31,819 INFO L226 Difference]: Without dead ends: 720 [2023-02-18 00:22:31,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 65 SyntacticMatches, 40 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5632 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2339, Invalid=11233, Unknown=0, NotChecked=0, Total=13572 [2023-02-18 00:22:31,820 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 376 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:31,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 366 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:22:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2023-02-18 00:22:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 91. [2023-02-18 00:22:32,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-18 00:22:32,208 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-18 00:22:32,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:32,208 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-18 00:22:32,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:32,208 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-18 00:22:32,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:22:32,209 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:32,209 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:32,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2023-02-18 00:22:32,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2023-02-18 00:22:32,413 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:32,414 INFO L85 PathProgramCache]: Analyzing trace with hash -929645831, now seen corresponding path program 78 times [2023-02-18 00:22:32,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:32,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724530710] [2023-02-18 00:22:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:32,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:32,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:32,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724530710] [2023-02-18 00:22:32,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724530710] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:32,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807343222] [2023-02-18 00:22:32,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:22:32,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:32,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:32,695 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:22:32,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2023-02-18 00:22:32,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-02-18 00:22:32,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:32,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:22:32,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:33,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:33,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807343222] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:33,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:33,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2023-02-18 00:22:33,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466553092] [2023-02-18 00:22:33,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:33,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-18 00:22:33,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:33,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-18 00:22:33,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 00:22:33,360 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:37,791 INFO L93 Difference]: Finished difference Result 812 states and 841 transitions. [2023-02-18 00:22:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-18 00:22:37,791 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:22:37,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:37,792 INFO L225 Difference]: With dead ends: 812 [2023-02-18 00:22:37,792 INFO L226 Difference]: Without dead ends: 766 [2023-02-18 00:22:37,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 65 SyntacticMatches, 41 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4636 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1983, Invalid=9359, Unknown=0, NotChecked=0, Total=11342 [2023-02-18 00:22:37,793 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 438 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:37,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 389 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:22:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2023-02-18 00:22:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 91. [2023-02-18 00:22:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-18 00:22:38,183 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-18 00:22:38,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:38,183 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-18 00:22:38,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:38,184 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-18 00:22:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:22:38,184 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:38,184 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:38,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2023-02-18 00:22:38,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:38,384 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash -350822600, now seen corresponding path program 13 times [2023-02-18 00:22:38,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:38,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353895836] [2023-02-18 00:22:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:38,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:38,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:38,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353895836] [2023-02-18 00:22:38,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353895836] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:38,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117350997] [2023-02-18 00:22:38,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:22:38,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:38,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:38,666 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:22:38,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2023-02-18 00:22:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:38,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:22:38,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:39,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:39,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117350997] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:39,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:39,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 52 [2023-02-18 00:22:39,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929674457] [2023-02-18 00:22:39,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:39,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-18 00:22:39,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:39,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-18 00:22:39,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=2108, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 00:22:39,316 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:43,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:43,833 INFO L93 Difference]: Finished difference Result 860 states and 891 transitions. [2023-02-18 00:22:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 00:22:43,833 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-18 00:22:43,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:43,834 INFO L225 Difference]: With dead ends: 860 [2023-02-18 00:22:43,834 INFO L226 Difference]: Without dead ends: 814 [2023-02-18 00:22:43,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 65 SyntacticMatches, 42 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1637, Invalid=7293, Unknown=0, NotChecked=0, Total=8930 [2023-02-18 00:22:43,834 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 480 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:43,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 300 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:22:43,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2023-02-18 00:22:44,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 93. [2023-02-18 00:22:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2023-02-18 00:22:44,226 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 63 [2023-02-18 00:22:44,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:44,226 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2023-02-18 00:22:44,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:44,226 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2023-02-18 00:22:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 00:22:44,226 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:44,226 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:44,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2023-02-18 00:22:44,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:44,427 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:44,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2032864333, now seen corresponding path program 26 times [2023-02-18 00:22:44,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:44,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848533795] [2023-02-18 00:22:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:44,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 78 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:44,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:44,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848533795] [2023-02-18 00:22:44,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848533795] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:44,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653932737] [2023-02-18 00:22:44,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:22:44,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:44,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:44,580 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:22:44,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2023-02-18 00:22:44,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:22:44,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:44,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:22:44,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:44,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:44,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653932737] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:44,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:44,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 21 [2023-02-18 00:22:44,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525565911] [2023-02-18 00:22:44,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:44,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 00:22:44,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:44,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 00:22:44,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2023-02-18 00:22:44,929 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:45,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:45,512 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2023-02-18 00:22:45,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 00:22:45,512 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-02-18 00:22:45,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:45,512 INFO L225 Difference]: With dead ends: 104 [2023-02-18 00:22:45,512 INFO L226 Difference]: Without dead ends: 102 [2023-02-18 00:22:45,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 84 SyntacticMatches, 54 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=452, Invalid=880, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 00:22:45,513 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 64 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:45,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 263 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:22:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-18 00:22:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2023-02-18 00:22:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 95 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2023-02-18 00:22:45,915 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 64 [2023-02-18 00:22:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:45,915 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2023-02-18 00:22:45,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2023-02-18 00:22:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:22:45,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:45,915 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:45,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2023-02-18 00:22:46,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2023-02-18 00:22:46,116 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:46,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:46,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2017627683, now seen corresponding path program 27 times [2023-02-18 00:22:46,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:46,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002472741] [2023-02-18 00:22:46,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:46,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:46,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:46,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002472741] [2023-02-18 00:22:46,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002472741] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:46,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110131093] [2023-02-18 00:22:46,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:22:46,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:46,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:46,449 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:22:46,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2023-02-18 00:22:46,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-18 00:22:46,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:46,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:22:46,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:47,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:47,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110131093] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:47,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:47,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2023-02-18 00:22:47,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708070936] [2023-02-18 00:22:47,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:47,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-18 00:22:47,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:47,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-18 00:22:47,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=3801, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 00:22:47,320 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:48,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:48,668 INFO L93 Difference]: Finished difference Result 207 states and 225 transitions. [2023-02-18 00:22:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 00:22:48,668 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:22:48,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:48,668 INFO L225 Difference]: With dead ends: 207 [2023-02-18 00:22:48,668 INFO L226 Difference]: Without dead ends: 158 [2023-02-18 00:22:48,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 69 SyntacticMatches, 31 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5298 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1855, Invalid=8245, Unknown=0, NotChecked=0, Total=10100 [2023-02-18 00:22:48,669 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:48,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 276 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:22:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-18 00:22:49,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2023-02-18 00:22:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:49,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:22:49,104 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:22:49,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:49,104 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:22:49,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:22:49,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:22:49,104 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:49,104 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:49,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2023-02-18 00:22:49,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2023-02-18 00:22:49,305 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:49,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1732458524, now seen corresponding path program 79 times [2023-02-18 00:22:49,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:49,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681572089] [2023-02-18 00:22:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:49,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 261 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:49,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:49,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681572089] [2023-02-18 00:22:49,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681572089] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:49,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179458719] [2023-02-18 00:22:49,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:22:49,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:49,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:49,633 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:22:49,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2023-02-18 00:22:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:49,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:22:49,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:50,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:50,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179458719] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:50,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:50,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 68 [2023-02-18 00:22:50,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480162944] [2023-02-18 00:22:50,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:50,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-18 00:22:50,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:50,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-18 00:22:50,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=3711, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 00:22:50,454 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:52,426 INFO L93 Difference]: Finished difference Result 268 states and 287 transitions. [2023-02-18 00:22:52,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-18 00:22:52,426 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:22:52,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:52,427 INFO L225 Difference]: With dead ends: 268 [2023-02-18 00:22:52,427 INFO L226 Difference]: Without dead ends: 219 [2023-02-18 00:22:52,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 69 SyntacticMatches, 32 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6219 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2254, Invalid=10628, Unknown=0, NotChecked=0, Total=12882 [2023-02-18 00:22:52,427 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 103 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:52,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 379 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:22:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-02-18 00:22:52,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 97. [2023-02-18 00:22:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:22:52,884 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:22:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:52,884 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:22:52,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:52,885 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:22:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:22:52,885 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:52,885 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:52,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2023-02-18 00:22:53,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:53,085 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:53,085 INFO L85 PathProgramCache]: Analyzing trace with hash -86233603, now seen corresponding path program 80 times [2023-02-18 00:22:53,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:53,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246868649] [2023-02-18 00:22:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:53,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 261 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:53,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:53,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246868649] [2023-02-18 00:22:53,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246868649] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:53,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831986614] [2023-02-18 00:22:53,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:22:53,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:53,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:53,412 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:22:53,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2023-02-18 00:22:53,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:22:53,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:53,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:22:53,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:53,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:54,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831986614] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:54,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:54,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 67 [2023-02-18 00:22:54,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932746765] [2023-02-18 00:22:54,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:54,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-18 00:22:54,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:54,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-18 00:22:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=3619, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 00:22:54,223 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:56,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:56,695 INFO L93 Difference]: Finished difference Result 328 states and 348 transitions. [2023-02-18 00:22:56,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-18 00:22:56,695 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:22:56,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:56,695 INFO L225 Difference]: With dead ends: 328 [2023-02-18 00:22:56,696 INFO L226 Difference]: Without dead ends: 279 [2023-02-18 00:22:56,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 69 SyntacticMatches, 33 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7111 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2671, Invalid=12829, Unknown=0, NotChecked=0, Total=15500 [2023-02-18 00:22:56,696 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 209 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:56,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 239 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:22:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-02-18 00:22:57,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 97. [2023-02-18 00:22:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:22:57,170 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:22:57,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:57,170 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:22:57,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:57,170 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:22:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:22:57,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:57,170 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:57,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2023-02-18 00:22:57,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:57,371 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:57,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:57,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1253279748, now seen corresponding path program 81 times [2023-02-18 00:22:57,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:57,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973352699] [2023-02-18 00:22:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:57,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 261 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:57,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:57,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973352699] [2023-02-18 00:22:57,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973352699] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:57,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156193181] [2023-02-18 00:22:57,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:22:57,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:57,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:57,689 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:22:57,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2023-02-18 00:22:57,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-18 00:22:57,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:57,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:22:57,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:58,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:58,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156193181] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:58,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:58,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 66 [2023-02-18 00:22:58,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812770698] [2023-02-18 00:22:58,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:58,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-18 00:22:58,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:58,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-18 00:22:58,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3525, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 00:22:58,488 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:01,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:01,571 INFO L93 Difference]: Finished difference Result 387 states and 408 transitions. [2023-02-18 00:23:01,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-02-18 00:23:01,571 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:23:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:01,571 INFO L225 Difference]: With dead ends: 387 [2023-02-18 00:23:01,571 INFO L226 Difference]: Without dead ends: 338 [2023-02-18 00:23:01,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 69 SyntacticMatches, 34 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7915 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3057, Invalid=14765, Unknown=0, NotChecked=0, Total=17822 [2023-02-18 00:23:01,572 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 167 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:01,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 354 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:23:01,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-02-18 00:23:02,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 97. [2023-02-18 00:23:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:23:02,057 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:23:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:02,057 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:23:02,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:23:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:23:02,057 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:02,057 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:02,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2023-02-18 00:23:02,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:02,258 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:02,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1757114909, now seen corresponding path program 82 times [2023-02-18 00:23:02,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:02,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977693760] [2023-02-18 00:23:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:02,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:02,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:02,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977693760] [2023-02-18 00:23:02,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977693760] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:02,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493054695] [2023-02-18 00:23:02,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:23:02,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:02,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:02,599 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:23:02,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2023-02-18 00:23:02,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:23:02,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:02,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:23:02,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:03,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:03,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493054695] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:03,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:03,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 65 [2023-02-18 00:23:03,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847227337] [2023-02-18 00:23:03,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:03,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-18 00:23:03,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:03,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-18 00:23:03,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 00:23:03,387 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:06,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:06,978 INFO L93 Difference]: Finished difference Result 445 states and 467 transitions. [2023-02-18 00:23:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-18 00:23:06,979 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:23:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:06,979 INFO L225 Difference]: With dead ends: 445 [2023-02-18 00:23:06,979 INFO L226 Difference]: Without dead ends: 396 [2023-02-18 00:23:06,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 69 SyntacticMatches, 35 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8591 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3385, Invalid=16355, Unknown=0, NotChecked=0, Total=19740 [2023-02-18 00:23:06,980 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:06,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 316 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:23:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-02-18 00:23:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 97. [2023-02-18 00:23:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:23:07,469 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:23:07,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:07,469 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:23:07,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:23:07,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:23:07,470 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:07,470 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:07,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2023-02-18 00:23:07,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2023-02-18 00:23:07,670 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:07,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:07,670 INFO L85 PathProgramCache]: Analyzing trace with hash -362532900, now seen corresponding path program 83 times [2023-02-18 00:23:07,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:07,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469044102] [2023-02-18 00:23:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:07,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 261 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:07,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:07,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469044102] [2023-02-18 00:23:07,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469044102] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:07,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069601271] [2023-02-18 00:23:07,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:23:07,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:07,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:07,991 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:23:07,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2023-02-18 00:23:08,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-02-18 00:23:08,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:08,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:23:08,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:08,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:08,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069601271] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:08,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:08,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 64 [2023-02-18 00:23:08,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586885977] [2023-02-18 00:23:08,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:08,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-18 00:23:08,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:08,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-18 00:23:08,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=3331, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 00:23:08,777 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:12,859 INFO L93 Difference]: Finished difference Result 502 states and 525 transitions. [2023-02-18 00:23:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-02-18 00:23:12,859 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:23:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:12,859 INFO L225 Difference]: With dead ends: 502 [2023-02-18 00:23:12,859 INFO L226 Difference]: Without dead ends: 453 [2023-02-18 00:23:12,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 69 SyntacticMatches, 36 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9095 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3634, Invalid=17536, Unknown=0, NotChecked=0, Total=21170 [2023-02-18 00:23:12,860 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 315 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:12,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 333 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:23:12,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-02-18 00:23:13,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 97. [2023-02-18 00:23:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:23:13,362 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:23:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:13,362 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:23:13,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:13,363 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:23:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:23:13,363 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:13,363 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:13,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2023-02-18 00:23:13,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2023-02-18 00:23:13,567 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:13,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:13,568 INFO L85 PathProgramCache]: Analyzing trace with hash 400375357, now seen corresponding path program 84 times [2023-02-18 00:23:13,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:13,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076592271] [2023-02-18 00:23:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:13,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 261 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:13,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:13,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076592271] [2023-02-18 00:23:13,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076592271] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:13,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388349991] [2023-02-18 00:23:13,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:23:13,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:13,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:13,878 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:23:13,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2023-02-18 00:23:13,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-02-18 00:23:13,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:13,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:23:13,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:14,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:14,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388349991] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:14,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:14,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 63 [2023-02-18 00:23:14,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301557240] [2023-02-18 00:23:14,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:14,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-18 00:23:14,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:14,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-18 00:23:14,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3231, Unknown=0, NotChecked=0, Total=3906 [2023-02-18 00:23:14,666 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:19,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:19,208 INFO L93 Difference]: Finished difference Result 558 states and 582 transitions. [2023-02-18 00:23:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-18 00:23:19,208 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:23:19,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:19,209 INFO L225 Difference]: With dead ends: 558 [2023-02-18 00:23:19,209 INFO L226 Difference]: Without dead ends: 509 [2023-02-18 00:23:19,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 69 SyntacticMatches, 37 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9395 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3789, Invalid=18263, Unknown=0, NotChecked=0, Total=22052 [2023-02-18 00:23:19,210 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 304 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:19,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 399 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:23:19,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-02-18 00:23:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 97. [2023-02-18 00:23:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:23:19,715 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:23:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:19,715 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:23:19,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:19,716 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:23:19,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:23:19,716 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:19,716 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:19,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2023-02-18 00:23:19,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2023-02-18 00:23:19,921 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:19,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:19,921 INFO L85 PathProgramCache]: Analyzing trace with hash -406298692, now seen corresponding path program 85 times [2023-02-18 00:23:19,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:19,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642033230] [2023-02-18 00:23:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:19,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 261 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:20,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:20,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642033230] [2023-02-18 00:23:20,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642033230] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:20,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478074417] [2023-02-18 00:23:20,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:23:20,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:20,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:20,233 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:23:20,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2023-02-18 00:23:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:20,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:23:20,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:20,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:21,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478074417] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:21,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:21,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 62 [2023-02-18 00:23:21,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489532777] [2023-02-18 00:23:21,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:21,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-18 00:23:21,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:21,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-18 00:23:21,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 00:23:21,008 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:25,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:25,921 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2023-02-18 00:23:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-18 00:23:25,921 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:23:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:25,921 INFO L225 Difference]: With dead ends: 613 [2023-02-18 00:23:25,922 INFO L226 Difference]: Without dead ends: 564 [2023-02-18 00:23:25,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 69 SyntacticMatches, 38 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9471 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3841, Invalid=18509, Unknown=0, NotChecked=0, Total=22350 [2023-02-18 00:23:25,922 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 543 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:25,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 371 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:23:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2023-02-18 00:23:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 97. [2023-02-18 00:23:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:23:26,435 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:23:26,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:26,435 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:23:26,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:23:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:23:26,435 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:26,435 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:26,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2023-02-18 00:23:26,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:26,638 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:26,639 INFO L85 PathProgramCache]: Analyzing trace with hash 121868893, now seen corresponding path program 86 times [2023-02-18 00:23:26,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:26,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137033247] [2023-02-18 00:23:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:26,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 261 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:26,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:26,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137033247] [2023-02-18 00:23:26,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137033247] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:26,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002008014] [2023-02-18 00:23:26,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:23:26,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:26,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:26,954 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:23:26,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2023-02-18 00:23:27,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:23:27,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:27,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:23:27,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:27,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:27,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002008014] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:27,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:27,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 61 [2023-02-18 00:23:27,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980391485] [2023-02-18 00:23:27,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:27,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-18 00:23:27,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-18 00:23:27,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=3025, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 00:23:27,735 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:33,000 INFO L93 Difference]: Finished difference Result 667 states and 693 transitions. [2023-02-18 00:23:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-02-18 00:23:33,001 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:23:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:33,002 INFO L225 Difference]: With dead ends: 667 [2023-02-18 00:23:33,002 INFO L226 Difference]: Without dead ends: 618 [2023-02-18 00:23:33,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 69 SyntacticMatches, 39 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9314 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3787, Invalid=18265, Unknown=0, NotChecked=0, Total=22052 [2023-02-18 00:23:33,003 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 391 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:33,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 418 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:23:33,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-02-18 00:23:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 97. [2023-02-18 00:23:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:23:33,518 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:23:33,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:33,519 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:23:33,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:23:33,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:23:33,519 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:33,519 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:33,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2023-02-18 00:23:33,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:33,724 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:33,724 INFO L85 PathProgramCache]: Analyzing trace with hash -969472100, now seen corresponding path program 87 times [2023-02-18 00:23:33,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:33,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192096825] [2023-02-18 00:23:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:33,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 261 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:34,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:34,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192096825] [2023-02-18 00:23:34,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192096825] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:34,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119924445] [2023-02-18 00:23:34,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:23:34,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:34,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:34,035 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:23:34,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2023-02-18 00:23:34,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-18 00:23:34,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:34,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:23:34,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:34,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:34,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119924445] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:34,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:34,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 60 [2023-02-18 00:23:34,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966114249] [2023-02-18 00:23:34,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:34,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-18 00:23:34,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-18 00:23:34,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2919, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 00:23:34,784 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:40,313 INFO L93 Difference]: Finished difference Result 720 states and 747 transitions. [2023-02-18 00:23:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-18 00:23:40,313 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:23:40,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:40,314 INFO L225 Difference]: With dead ends: 720 [2023-02-18 00:23:40,314 INFO L226 Difference]: Without dead ends: 671 [2023-02-18 00:23:40,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 69 SyntacticMatches, 40 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8921 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3630, Invalid=17540, Unknown=0, NotChecked=0, Total=21170 [2023-02-18 00:23:40,314 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 439 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:40,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 391 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:23:40,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2023-02-18 00:23:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 97. [2023-02-18 00:23:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:23:40,840 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:23:40,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:40,840 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:23:40,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:40,840 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:23:40,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:23:40,840 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:40,840 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:40,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2023-02-18 00:23:41,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2023-02-18 00:23:41,044 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:41,045 INFO L85 PathProgramCache]: Analyzing trace with hash 242249341, now seen corresponding path program 88 times [2023-02-18 00:23:41,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:41,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065718367] [2023-02-18 00:23:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:41,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:41,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:41,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065718367] [2023-02-18 00:23:41,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065718367] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:41,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39422390] [2023-02-18 00:23:41,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:23:41,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:41,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:41,358 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:23:41,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2023-02-18 00:23:41,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:23:41,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:41,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:23:41,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:41,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:42,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39422390] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:42,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:42,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 59 [2023-02-18 00:23:42,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37677443] [2023-02-18 00:23:42,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:42,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 00:23:42,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:42,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 00:23:42,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2811, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 00:23:42,098 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:47,893 INFO L93 Difference]: Finished difference Result 772 states and 800 transitions. [2023-02-18 00:23:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-18 00:23:47,893 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:23:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:47,894 INFO L225 Difference]: With dead ends: 772 [2023-02-18 00:23:47,894 INFO L226 Difference]: Without dead ends: 723 [2023-02-18 00:23:47,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 69 SyntacticMatches, 41 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8300 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3379, Invalid=16361, Unknown=0, NotChecked=0, Total=19740 [2023-02-18 00:23:47,895 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 472 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:47,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 381 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:23:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2023-02-18 00:23:48,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 97. [2023-02-18 00:23:48,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:48,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:23:48,421 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:23:48,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:48,421 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:23:48,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:48,421 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:23:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:23:48,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:48,421 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:48,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2023-02-18 00:23:48,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2023-02-18 00:23:48,622 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:48,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:48,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683524, now seen corresponding path program 89 times [2023-02-18 00:23:48,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:48,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740306087] [2023-02-18 00:23:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:48,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 261 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:48,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:48,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740306087] [2023-02-18 00:23:48,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740306087] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:48,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293864040] [2023-02-18 00:23:48,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:23:48,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:48,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:48,943 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:23:48,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2023-02-18 00:23:48,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-02-18 00:23:48,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:48,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:23:48,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:49,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:49,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293864040] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:49,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:49,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 58 [2023-02-18 00:23:49,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778590308] [2023-02-18 00:23:49,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:49,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-18 00:23:49,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-18 00:23:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2701, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 00:23:49,674 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:55,724 INFO L93 Difference]: Finished difference Result 823 states and 852 transitions. [2023-02-18 00:23:55,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-02-18 00:23:55,724 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:23:55,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:55,725 INFO L225 Difference]: With dead ends: 823 [2023-02-18 00:23:55,725 INFO L226 Difference]: Without dead ends: 774 [2023-02-18 00:23:55,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 69 SyntacticMatches, 42 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7471 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3049, Invalid=14773, Unknown=0, NotChecked=0, Total=17822 [2023-02-18 00:23:55,726 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 493 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:55,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 419 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:23:55,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2023-02-18 00:23:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 97. [2023-02-18 00:23:56,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:23:56,262 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:23:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:56,262 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:23:56,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:56,262 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:23:56,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:23:56,263 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:56,263 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:56,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2023-02-18 00:23:56,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:56,463 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:56,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:56,463 INFO L85 PathProgramCache]: Analyzing trace with hash -43658595, now seen corresponding path program 90 times [2023-02-18 00:23:56,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:56,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543472705] [2023-02-18 00:23:56,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:56,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 261 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:56,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:56,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543472705] [2023-02-18 00:23:56,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543472705] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:56,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802811940] [2023-02-18 00:23:56,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:23:56,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:56,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:56,779 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:23:56,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2023-02-18 00:23:56,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-02-18 00:23:56,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:56,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:23:56,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:57,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:57,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802811940] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:57,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:57,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2023-02-18 00:23:57,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087518647] [2023-02-18 00:23:57,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:57,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-18 00:23:57,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-18 00:23:57,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 00:23:57,534 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:03,746 INFO L93 Difference]: Finished difference Result 873 states and 903 transitions. [2023-02-18 00:24:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-18 00:24:03,746 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:24:03,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:03,747 INFO L225 Difference]: With dead ends: 873 [2023-02-18 00:24:03,747 INFO L226 Difference]: Without dead ends: 824 [2023-02-18 00:24:03,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 69 SyntacticMatches, 43 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6466 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2661, Invalid=12839, Unknown=0, NotChecked=0, Total=15500 [2023-02-18 00:24:03,748 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 697 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:03,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 387 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:24:03,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2023-02-18 00:24:04,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 97. [2023-02-18 00:24:04,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:24:04,284 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:24:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:04,284 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:24:04,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:24:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:24:04,284 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:04,285 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:04,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2023-02-18 00:24:04,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:04,485 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash -559169700, now seen corresponding path program 91 times [2023-02-18 00:24:04,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:04,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336876167] [2023-02-18 00:24:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:04,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 261 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:04,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:04,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336876167] [2023-02-18 00:24:04,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336876167] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:04,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573798155] [2023-02-18 00:24:04,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:24:04,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:04,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:04,803 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:24:04,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2023-02-18 00:24:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:04,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:24:04,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:05,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:05,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573798155] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:05,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:05,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 56 [2023-02-18 00:24:05,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761887363] [2023-02-18 00:24:05,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:05,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-18 00:24:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:05,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-18 00:24:05,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2475, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 00:24:05,517 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:11,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:11,915 INFO L93 Difference]: Finished difference Result 922 states and 953 transitions. [2023-02-18 00:24:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-02-18 00:24:11,915 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:24:11,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:11,916 INFO L225 Difference]: With dead ends: 922 [2023-02-18 00:24:11,916 INFO L226 Difference]: Without dead ends: 873 [2023-02-18 00:24:11,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 69 SyntacticMatches, 44 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5297 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2242, Invalid=10640, Unknown=0, NotChecked=0, Total=12882 [2023-02-18 00:24:11,917 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 711 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:11,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 367 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:24:11,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2023-02-18 00:24:12,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 97. [2023-02-18 00:24:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-18 00:24:12,461 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-18 00:24:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:12,462 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-18 00:24:12,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-18 00:24:12,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:24:12,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:12,462 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:12,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2023-02-18 00:24:12,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2023-02-18 00:24:12,662 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:12,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:12,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1129988419, now seen corresponding path program 14 times [2023-02-18 00:24:12,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:12,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863342491] [2023-02-18 00:24:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:12,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:12,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:12,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863342491] [2023-02-18 00:24:12,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863342491] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:12,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756590150] [2023-02-18 00:24:12,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:24:12,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:12,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:12,999 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:24:13,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2023-02-18 00:24:13,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:24:13,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:13,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:24:13,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:13,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:13,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756590150] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:13,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:13,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 55 [2023-02-18 00:24:13,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717233597] [2023-02-18 00:24:13,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:13,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-18 00:24:13,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:13,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-18 00:24:13,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2359, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 00:24:13,752 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:20,324 INFO L93 Difference]: Finished difference Result 973 states and 1006 transitions. [2023-02-18 00:24:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-18 00:24:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-18 00:24:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:20,325 INFO L225 Difference]: With dead ends: 973 [2023-02-18 00:24:20,325 INFO L226 Difference]: Without dead ends: 924 [2023-02-18 00:24:20,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 69 SyntacticMatches, 45 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4089 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1841, Invalid=8259, Unknown=0, NotChecked=0, Total=10100 [2023-02-18 00:24:20,325 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 695 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:20,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 276 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:24:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2023-02-18 00:24:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 99. [2023-02-18 00:24:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.183673469387755) internal successors, (116), 98 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2023-02-18 00:24:20,882 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 67 [2023-02-18 00:24:20,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:20,882 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2023-02-18 00:24:20,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:20,882 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2023-02-18 00:24:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 00:24:20,883 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:20,883 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:20,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2023-02-18 00:24:21,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2023-02-18 00:24:21,083 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:21,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:21,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1945821609, now seen corresponding path program 28 times [2023-02-18 00:24:21,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:21,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841563374] [2023-02-18 00:24:21,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:21,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 91 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:21,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:21,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841563374] [2023-02-18 00:24:21,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841563374] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:21,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310205757] [2023-02-18 00:24:21,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:24:21,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:21,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:21,256 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:24:21,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2023-02-18 00:24:21,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:24:21,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:21,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:24:21,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:21,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:21,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310205757] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:21,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:21,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 22 [2023-02-18 00:24:21,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231124620] [2023-02-18 00:24:21,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:21,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 00:24:21,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:21,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 00:24:21,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2023-02-18 00:24:21,626 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:22,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:22,383 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2023-02-18 00:24:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 00:24:22,383 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-02-18 00:24:22,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:22,384 INFO L225 Difference]: With dead ends: 110 [2023-02-18 00:24:22,384 INFO L226 Difference]: Without dead ends: 108 [2023-02-18 00:24:22,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 89 SyntacticMatches, 58 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=505, Invalid=977, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 00:24:22,384 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 100 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:22,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 212 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:24:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-18 00:24:22,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2023-02-18 00:24:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2023-02-18 00:24:22,949 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 68 [2023-02-18 00:24:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:22,949 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2023-02-18 00:24:22,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:22,949 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2023-02-18 00:24:22,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:24:22,949 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:22,949 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:22,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2023-02-18 00:24:23,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2023-02-18 00:24:23,150 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:23,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:23,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1206883513, now seen corresponding path program 29 times [2023-02-18 00:24:23,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:23,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915735416] [2023-02-18 00:24:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:23,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:23,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:23,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915735416] [2023-02-18 00:24:23,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915735416] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:23,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703252804] [2023-02-18 00:24:23,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:24:23,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:23,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:23,525 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:24:23,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2023-02-18 00:24:23,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-02-18 00:24:23,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:24:23,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:24,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:24,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703252804] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:24,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:24,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2023-02-18 00:24:24,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738325539] [2023-02-18 00:24:24,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:24,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-02-18 00:24:24,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:24,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-02-18 00:24:24,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=4259, Unknown=0, NotChecked=0, Total=5256 [2023-02-18 00:24:24,479 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:26,260 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2023-02-18 00:24:26,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 00:24:26,260 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:24:26,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:26,260 INFO L225 Difference]: With dead ends: 220 [2023-02-18 00:24:26,260 INFO L226 Difference]: Without dead ends: 168 [2023-02-18 00:24:26,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 73 SyntacticMatches, 33 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5996 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2072, Invalid=9270, Unknown=0, NotChecked=0, Total=11342 [2023-02-18 00:24:26,261 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:26,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 311 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:24:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-18 00:24:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 103. [2023-02-18 00:24:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:24:26,869 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:24:26,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:26,869 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:24:26,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:26,869 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:24:26,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:24:26,870 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:26,870 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:26,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2023-02-18 00:24:27,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2023-02-18 00:24:27,074 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:27,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:27,075 INFO L85 PathProgramCache]: Analyzing trace with hash -962976904, now seen corresponding path program 92 times [2023-02-18 00:24:27,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:27,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152251751] [2023-02-18 00:24:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:27,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 302 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:27,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:27,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152251751] [2023-02-18 00:24:27,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152251751] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:27,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645618163] [2023-02-18 00:24:27,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:24:27,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:27,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:27,441 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:24:27,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2023-02-18 00:24:27,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:24:27,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:27,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:24:27,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:28,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:28,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645618163] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:28,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:28,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 72 [2023-02-18 00:24:28,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26720757] [2023-02-18 00:24:28,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:28,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-02-18 00:24:28,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-02-18 00:24:28,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=4164, Unknown=0, NotChecked=0, Total=5112 [2023-02-18 00:24:28,361 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:30,928 INFO L93 Difference]: Finished difference Result 285 states and 305 transitions. [2023-02-18 00:24:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-18 00:24:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:24:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:30,928 INFO L225 Difference]: With dead ends: 285 [2023-02-18 00:24:30,928 INFO L226 Difference]: Without dead ends: 233 [2023-02-18 00:24:30,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 73 SyntacticMatches, 34 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7059 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2530, Invalid=11990, Unknown=0, NotChecked=0, Total=14520 [2023-02-18 00:24:30,929 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 81 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:30,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 340 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:24:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-18 00:24:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 103. [2023-02-18 00:24:31,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:24:31,562 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:24:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:31,562 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:24:31,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:24:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:24:31,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:31,563 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:31,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2023-02-18 00:24:31,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2023-02-18 00:24:31,768 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:31,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1460879577, now seen corresponding path program 93 times [2023-02-18 00:24:31,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:31,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779352943] [2023-02-18 00:24:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:31,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 302 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:32,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:32,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779352943] [2023-02-18 00:24:32,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779352943] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:32,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594894300] [2023-02-18 00:24:32,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:24:32,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:32,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:32,133 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:24:32,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2023-02-18 00:24:32,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-02-18 00:24:32,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:32,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:24:32,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:32,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:33,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594894300] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:33,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:33,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 71 [2023-02-18 00:24:33,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102294373] [2023-02-18 00:24:33,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:33,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-18 00:24:33,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:33,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-18 00:24:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=4067, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 00:24:33,050 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:36,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:36,373 INFO L93 Difference]: Finished difference Result 349 states and 370 transitions. [2023-02-18 00:24:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-18 00:24:36,373 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:24:36,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:36,374 INFO L225 Difference]: With dead ends: 349 [2023-02-18 00:24:36,374 INFO L226 Difference]: Without dead ends: 297 [2023-02-18 00:24:36,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 73 SyntacticMatches, 35 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8106 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3015, Invalid=14541, Unknown=0, NotChecked=0, Total=17556 [2023-02-18 00:24:36,375 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 168 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:36,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 333 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:24:36,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-02-18 00:24:37,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 103. [2023-02-18 00:24:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:37,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:24:37,032 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:24:37,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:37,032 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:24:37,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:24:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:24:37,033 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:37,033 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:37,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2023-02-18 00:24:37,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2023-02-18 00:24:37,233 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:37,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1816163160, now seen corresponding path program 94 times [2023-02-18 00:24:37,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:37,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318766324] [2023-02-18 00:24:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:37,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 302 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:37,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:37,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318766324] [2023-02-18 00:24:37,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318766324] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:37,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046322745] [2023-02-18 00:24:37,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:24:37,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:37,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:37,591 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:24:37,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2023-02-18 00:24:37,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:24:37,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:37,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:24:37,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:38,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:38,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046322745] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:38,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:38,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 70 [2023-02-18 00:24:38,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076961047] [2023-02-18 00:24:38,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:38,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-02-18 00:24:38,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:38,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-02-18 00:24:38,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=3968, Unknown=0, NotChecked=0, Total=4830 [2023-02-18 00:24:38,483 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:42,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:42,597 INFO L93 Difference]: Finished difference Result 412 states and 434 transitions. [2023-02-18 00:24:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-18 00:24:42,598 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:24:42,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:42,598 INFO L225 Difference]: With dead ends: 412 [2023-02-18 00:24:42,598 INFO L226 Difference]: Without dead ends: 360 [2023-02-18 00:24:42,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 73 SyntacticMatches, 36 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9073 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3474, Invalid=16832, Unknown=0, NotChecked=0, Total=20306 [2023-02-18 00:24:42,599 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 172 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:42,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 381 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:24:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-02-18 00:24:43,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 103. [2023-02-18 00:24:43,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:43,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:24:43,275 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:24:43,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:43,275 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:24:43,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:43,276 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:24:43,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:24:43,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:43,276 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:43,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2023-02-18 00:24:43,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2023-02-18 00:24:43,476 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:43,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:43,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2104718585, now seen corresponding path program 95 times [2023-02-18 00:24:43,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:43,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253250284] [2023-02-18 00:24:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:43,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 302 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:43,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:43,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253250284] [2023-02-18 00:24:43,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253250284] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:43,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793909162] [2023-02-18 00:24:43,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:24:43,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:43,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:43,832 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:24:43,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2023-02-18 00:24:43,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-02-18 00:24:43,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:24:43,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:44,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:44,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793909162] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:44,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:44,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 69 [2023-02-18 00:24:44,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272451797] [2023-02-18 00:24:44,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:44,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-18 00:24:44,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:44,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-18 00:24:44,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=3867, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 00:24:44,705 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:49,502 INFO L93 Difference]: Finished difference Result 474 states and 497 transitions. [2023-02-18 00:24:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-18 00:24:49,502 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:24:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:49,503 INFO L225 Difference]: With dead ends: 474 [2023-02-18 00:24:49,503 INFO L226 Difference]: Without dead ends: 422 [2023-02-18 00:24:49,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 73 SyntacticMatches, 37 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9915 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3877, Invalid=18773, Unknown=0, NotChecked=0, Total=22650 [2023-02-18 00:24:49,503 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 286 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:49,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 269 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:24:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-02-18 00:24:50,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 103. [2023-02-18 00:24:50,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:50,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:24:50,183 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:24:50,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:50,184 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:24:50,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:50,184 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:24:50,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:24:50,184 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:50,184 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:50,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2023-02-18 00:24:50,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2023-02-18 00:24:50,384 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:50,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1559837496, now seen corresponding path program 96 times [2023-02-18 00:24:50,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:50,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085384360] [2023-02-18 00:24:50,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:50,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 302 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:50,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:50,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085384360] [2023-02-18 00:24:50,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085384360] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:50,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400064336] [2023-02-18 00:24:50,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:24:50,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:50,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:50,741 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:24:50,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2023-02-18 00:24:50,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-02-18 00:24:50,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:50,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:24:50,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:51,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:51,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400064336] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:51,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:51,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 68 [2023-02-18 00:24:51,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818969181] [2023-02-18 00:24:51,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:51,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-18 00:24:51,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:51,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-18 00:24:51,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=3764, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 00:24:51,614 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:57,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:57,096 INFO L93 Difference]: Finished difference Result 535 states and 559 transitions. [2023-02-18 00:24:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-02-18 00:24:57,096 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:24:57,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:57,096 INFO L225 Difference]: With dead ends: 535 [2023-02-18 00:24:57,096 INFO L226 Difference]: Without dead ends: 483 [2023-02-18 00:24:57,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 73 SyntacticMatches, 38 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10582 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4200, Invalid=20292, Unknown=0, NotChecked=0, Total=24492 [2023-02-18 00:24:57,097 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 264 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:57,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 382 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:24:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-02-18 00:24:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 103. [2023-02-18 00:24:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:57,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:24:57,783 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:24:57,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:57,783 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:24:57,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:57,783 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:24:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:24:57,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:57,784 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:57,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2023-02-18 00:24:57,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:57,984 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:57,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash -258854631, now seen corresponding path program 97 times [2023-02-18 00:24:57,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:57,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541962982] [2023-02-18 00:24:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:57,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 302 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:58,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:58,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541962982] [2023-02-18 00:24:58,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541962982] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:58,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623953097] [2023-02-18 00:24:58,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:24:58,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:58,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:58,338 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:24:58,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2023-02-18 00:24:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:58,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:24:58,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:58,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:59,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623953097] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:59,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:59,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 67 [2023-02-18 00:24:59,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827472729] [2023-02-18 00:24:59,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:59,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-18 00:24:59,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-18 00:24:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3659, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 00:24:59,209 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:05,324 INFO L93 Difference]: Finished difference Result 595 states and 620 transitions. [2023-02-18 00:25:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-02-18 00:25:05,324 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:25:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:05,325 INFO L225 Difference]: With dead ends: 595 [2023-02-18 00:25:05,325 INFO L226 Difference]: Without dead ends: 543 [2023-02-18 00:25:05,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 73 SyntacticMatches, 39 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11036 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4425, Invalid=21335, Unknown=0, NotChecked=0, Total=25760 [2023-02-18 00:25:05,326 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 276 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:05,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 431 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:25:05,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-02-18 00:25:06,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 103. [2023-02-18 00:25:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:25:06,028 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:25:06,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:06,029 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:25:06,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:25:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:25:06,029 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:06,029 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:06,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2023-02-18 00:25:06,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:06,229 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:06,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1425900776, now seen corresponding path program 98 times [2023-02-18 00:25:06,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:06,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041857985] [2023-02-18 00:25:06,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:06,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 302 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:06,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:25:06,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041857985] [2023-02-18 00:25:06,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041857985] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:25:06,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942014275] [2023-02-18 00:25:06,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:25:06,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:06,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:25:06,577 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:25:06,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2023-02-18 00:25:06,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:25:06,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:25:06,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:25:06,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:25:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:07,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:25:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:07,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942014275] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:25:07,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:25:07,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 66 [2023-02-18 00:25:07,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721240963] [2023-02-18 00:25:07,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:25:07,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-18 00:25:07,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:25:07,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-18 00:25:07,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=3552, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 00:25:07,427 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:14,061 INFO L93 Difference]: Finished difference Result 654 states and 680 transitions. [2023-02-18 00:25:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-02-18 00:25:14,061 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:25:14,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:14,062 INFO L225 Difference]: With dead ends: 654 [2023-02-18 00:25:14,062 INFO L226 Difference]: Without dead ends: 602 [2023-02-18 00:25:14,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 73 SyntacticMatches, 40 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11251 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4540, Invalid=21866, Unknown=0, NotChecked=0, Total=26406 [2023-02-18 00:25:14,063 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 389 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:14,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 370 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:25:14,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2023-02-18 00:25:14,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 103. [2023-02-18 00:25:14,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:14,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:25:14,767 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:25:14,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:14,768 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:25:14,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:14,768 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:25:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:25:14,768 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:14,768 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:14,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2023-02-18 00:25:14,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:14,968 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1584493881, now seen corresponding path program 99 times [2023-02-18 00:25:14,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:14,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446775332] [2023-02-18 00:25:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:14,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 302 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:15,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:25:15,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446775332] [2023-02-18 00:25:15,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446775332] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:25:15,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630983471] [2023-02-18 00:25:15,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:25:15,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:15,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:25:15,317 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:25:15,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2023-02-18 00:25:15,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-02-18 00:25:15,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:25:15,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:25:15,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:25:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:15,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:25:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:16,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630983471] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:25:16,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:25:16,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 65 [2023-02-18 00:25:16,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977974574] [2023-02-18 00:25:16,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:25:16,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-18 00:25:16,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:25:16,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-18 00:25:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=3443, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 00:25:16,158 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:23,257 INFO L93 Difference]: Finished difference Result 712 states and 739 transitions. [2023-02-18 00:25:23,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-02-18 00:25:23,258 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:25:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:23,258 INFO L225 Difference]: With dead ends: 712 [2023-02-18 00:25:23,258 INFO L226 Difference]: Without dead ends: 660 [2023-02-18 00:25:23,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 73 SyntacticMatches, 41 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11213 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4539, Invalid=21867, Unknown=0, NotChecked=0, Total=26406 [2023-02-18 00:25:23,259 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 480 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:23,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 387 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:25:23,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2023-02-18 00:25:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 103. [2023-02-18 00:25:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:25:23,986 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:25:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:23,986 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:25:23,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:23,986 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:25:23,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:25:23,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:23,986 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:23,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2023-02-18 00:25:24,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:24,186 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:24,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:24,187 INFO L85 PathProgramCache]: Analyzing trace with hash -535153928, now seen corresponding path program 100 times [2023-02-18 00:25:24,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:24,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412299501] [2023-02-18 00:25:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:24,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 302 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:24,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:25:24,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412299501] [2023-02-18 00:25:24,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412299501] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:25:24,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805934104] [2023-02-18 00:25:24,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:25:24,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:24,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:25:24,537 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:25:24,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2023-02-18 00:25:24,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:25:24,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:25:24,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:25:24,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:25:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:25,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:25:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:25,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805934104] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:25:25,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:25:25,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 64 [2023-02-18 00:25:25,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413412449] [2023-02-18 00:25:25,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:25:25,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-18 00:25:25,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:25:25,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-18 00:25:25,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=3332, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 00:25:25,378 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:32,856 INFO L93 Difference]: Finished difference Result 769 states and 797 transitions. [2023-02-18 00:25:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-02-18 00:25:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:25:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:32,857 INFO L225 Difference]: With dead ends: 769 [2023-02-18 00:25:32,857 INFO L226 Difference]: Without dead ends: 717 [2023-02-18 00:25:32,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 73 SyntacticMatches, 42 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10916 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4422, Invalid=21338, Unknown=0, NotChecked=0, Total=25760 [2023-02-18 00:25:32,858 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 460 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:32,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 379 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:25:32,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2023-02-18 00:25:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 103. [2023-02-18 00:25:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:25:33,565 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:25:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:33,565 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:25:33,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:25:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:25:33,565 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:33,565 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:33,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2023-02-18 00:25:33,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2023-02-18 00:25:33,766 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash 227754329, now seen corresponding path program 101 times [2023-02-18 00:25:33,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:33,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244814185] [2023-02-18 00:25:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:33,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 302 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:34,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:25:34,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244814185] [2023-02-18 00:25:34,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244814185] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:25:34,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842310652] [2023-02-18 00:25:34,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:25:34,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:34,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:25:34,115 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:25:34,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2023-02-18 00:25:34,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-02-18 00:25:34,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:25:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:25:34,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:25:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:34,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:25:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:34,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842310652] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:25:34,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:25:34,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 63 [2023-02-18 00:25:34,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282919829] [2023-02-18 00:25:34,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:25:34,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-18 00:25:34,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:25:34,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-18 00:25:34,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=3219, Unknown=0, NotChecked=0, Total=3906 [2023-02-18 00:25:34,941 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:42,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:42,770 INFO L93 Difference]: Finished difference Result 825 states and 854 transitions. [2023-02-18 00:25:42,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-02-18 00:25:42,770 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:25:42,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:42,771 INFO L225 Difference]: With dead ends: 825 [2023-02-18 00:25:42,771 INFO L226 Difference]: Without dead ends: 773 [2023-02-18 00:25:42,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 73 SyntacticMatches, 43 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10362 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4195, Invalid=20297, Unknown=0, NotChecked=0, Total=24492 [2023-02-18 00:25:42,772 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 560 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:42,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 353 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:25:42,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2023-02-18 00:25:43,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 103. [2023-02-18 00:25:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:25:43,494 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:25:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:43,494 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:25:43,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:25:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:25:43,494 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:43,494 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:43,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2023-02-18 00:25:43,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:43,699 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:43,699 INFO L85 PathProgramCache]: Analyzing trace with hash -578919720, now seen corresponding path program 102 times [2023-02-18 00:25:43,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:43,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773016040] [2023-02-18 00:25:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:43,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 302 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:44,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:25:44,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773016040] [2023-02-18 00:25:44,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773016040] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:25:44,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112001555] [2023-02-18 00:25:44,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:25:44,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:44,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:25:44,047 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:25:44,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2023-02-18 00:25:44,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-02-18 00:25:44,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:25:44,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:25:44,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:25:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:44,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:25:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:44,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112001555] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:25:44,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:25:44,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 62 [2023-02-18 00:25:44,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036254987] [2023-02-18 00:25:44,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:25:44,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-18 00:25:44,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:25:44,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-18 00:25:44,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3104, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 00:25:44,897 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:53,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:53,058 INFO L93 Difference]: Finished difference Result 880 states and 910 transitions. [2023-02-18 00:25:53,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-02-18 00:25:53,058 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:25:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:53,059 INFO L225 Difference]: With dead ends: 880 [2023-02-18 00:25:53,059 INFO L226 Difference]: Without dead ends: 828 [2023-02-18 00:25:53,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 73 SyntacticMatches, 44 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9565 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3870, Invalid=18780, Unknown=0, NotChecked=0, Total=22650 [2023-02-18 00:25:53,060 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 571 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:53,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 366 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:25:53,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-02-18 00:25:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 103. [2023-02-18 00:25:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:25:53,794 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:25:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:53,794 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:25:53,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:25:53,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:25:53,795 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:53,795 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:53,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2023-02-18 00:25:53,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2023-02-18 00:25:53,995 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:53,995 INFO L85 PathProgramCache]: Analyzing trace with hash -50752135, now seen corresponding path program 103 times [2023-02-18 00:25:53,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:53,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144801700] [2023-02-18 00:25:53,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:53,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 302 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:54,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:25:54,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144801700] [2023-02-18 00:25:54,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144801700] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:25:54,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111274135] [2023-02-18 00:25:54,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:25:54,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:54,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:25:54,350 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:25:54,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2023-02-18 00:25:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:54,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:25:54,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:25:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:54,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:25:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:55,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111274135] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:25:55,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:25:55,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 61 [2023-02-18 00:25:55,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901238878] [2023-02-18 00:25:55,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:25:55,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-18 00:25:55,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:25:55,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-18 00:25:55,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=2987, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 00:25:55,158 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:26:03,597 INFO L93 Difference]: Finished difference Result 934 states and 965 transitions. [2023-02-18 00:26:03,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-02-18 00:26:03,597 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:26:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:26:03,598 INFO L225 Difference]: With dead ends: 934 [2023-02-18 00:26:03,598 INFO L226 Difference]: Without dead ends: 882 [2023-02-18 00:26:03,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 73 SyntacticMatches, 45 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8551 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3465, Invalid=16841, Unknown=0, NotChecked=0, Total=20306 [2023-02-18 00:26:03,599 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 586 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:26:03,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 347 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:26:03,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2023-02-18 00:26:04,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 103. [2023-02-18 00:26:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:26:04,333 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:26:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:26:04,333 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:26:04,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:26:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:26:04,333 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:26:04,333 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:26:04,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2023-02-18 00:26:04,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2023-02-18 00:26:04,533 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:26:04,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:26:04,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1142093128, now seen corresponding path program 104 times [2023-02-18 00:26:04,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:26:04,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902509056] [2023-02-18 00:26:04,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:26:04,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:26:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 302 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:04,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:04,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902509056] [2023-02-18 00:26:04,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902509056] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:04,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368901347] [2023-02-18 00:26:04,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:26:04,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:04,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:04,887 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:26:04,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2023-02-18 00:26:04,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:26:04,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:26:04,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:26:04,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:05,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:26:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:05,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368901347] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:26:05,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:26:05,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 60 [2023-02-18 00:26:05,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121972591] [2023-02-18 00:26:05,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:26:05,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-18 00:26:05,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:26:05,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-18 00:26:05,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=2868, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 00:26:05,721 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:14,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:26:14,467 INFO L93 Difference]: Finished difference Result 987 states and 1019 transitions. [2023-02-18 00:26:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-18 00:26:14,467 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:26:14,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:26:14,468 INFO L225 Difference]: With dead ends: 987 [2023-02-18 00:26:14,468 INFO L226 Difference]: Without dead ends: 935 [2023-02-18 00:26:14,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 73 SyntacticMatches, 46 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7358 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3004, Invalid=14552, Unknown=0, NotChecked=0, Total=17556 [2023-02-18 00:26:14,469 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 490 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:26:14,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 377 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:26:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2023-02-18 00:26:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 103. [2023-02-18 00:26:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:26:15,214 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:26:15,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:26:15,214 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:26:15,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:26:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:26:15,214 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:26:15,214 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:26:15,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2023-02-18 00:26:15,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:15,415 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:26:15,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:26:15,415 INFO L85 PathProgramCache]: Analyzing trace with hash 69628313, now seen corresponding path program 105 times [2023-02-18 00:26:15,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:26:15,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572237009] [2023-02-18 00:26:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:26:15,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:26:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 302 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:15,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:15,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572237009] [2023-02-18 00:26:15,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572237009] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:15,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792975144] [2023-02-18 00:26:15,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:26:15,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:15,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:15,773 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:26:15,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2023-02-18 00:26:15,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-02-18 00:26:15,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:26:15,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:26:15,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:16,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:26:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:16,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792975144] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:26:16,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:26:16,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 59 [2023-02-18 00:26:16,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118481983] [2023-02-18 00:26:16,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:26:16,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 00:26:16,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:26:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 00:26:16,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=2747, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 00:26:16,608 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:25,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:26:25,621 INFO L93 Difference]: Finished difference Result 1039 states and 1072 transitions. [2023-02-18 00:26:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-18 00:26:25,621 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:26:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:26:25,622 INFO L225 Difference]: With dead ends: 1039 [2023-02-18 00:26:25,622 INFO L226 Difference]: Without dead ends: 987 [2023-02-18 00:26:25,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 73 SyntacticMatches, 47 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6002 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2517, Invalid=12003, Unknown=0, NotChecked=0, Total=14520 [2023-02-18 00:26:25,623 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 724 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:26:25,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 350 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:26:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2023-02-18 00:26:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 103. [2023-02-18 00:26:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2023-02-18 00:26:26,376 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2023-02-18 00:26:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:26:26,376 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2023-02-18 00:26:26,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2023-02-18 00:26:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:26:26,376 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:26:26,376 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:26:26,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2023-02-18 00:26:26,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2023-02-18 00:26:26,576 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:26:26,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:26:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1415304552, now seen corresponding path program 15 times [2023-02-18 00:26:26,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:26:26,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315329466] [2023-02-18 00:26:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:26:26,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:26:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:26,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:26,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315329466] [2023-02-18 00:26:26,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315329466] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:26,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41375223] [2023-02-18 00:26:26,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:26:26,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:26,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:26,931 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:26:26,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2023-02-18 00:26:26,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-02-18 00:26:26,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:26:26,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:26:26,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:27,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:26:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:27,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41375223] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:26:27,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:26:27,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 58 [2023-02-18 00:26:27,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771642483] [2023-02-18 00:26:27,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:26:27,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-18 00:26:27,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:26:27,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-18 00:26:27,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=2624, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 00:26:27,751 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:26:37,267 INFO L93 Difference]: Finished difference Result 1093 states and 1128 transitions. [2023-02-18 00:26:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-18 00:26:37,267 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 00:26:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:26:37,268 INFO L225 Difference]: With dead ends: 1093 [2023-02-18 00:26:37,268 INFO L226 Difference]: Without dead ends: 1041 [2023-02-18 00:26:37,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 73 SyntacticMatches, 48 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4618 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2057, Invalid=9285, Unknown=0, NotChecked=0, Total=11342 [2023-02-18 00:26:37,268 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 539 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:26:37,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 330 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:26:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2023-02-18 00:26:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 105. [2023-02-18 00:26:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 104 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2023-02-18 00:26:38,044 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 71 [2023-02-18 00:26:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:26:38,044 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2023-02-18 00:26:38,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2023-02-18 00:26:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-18 00:26:38,044 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:26:38,044 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:26:38,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2023-02-18 00:26:38,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:38,249 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:26:38,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:26:38,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1329099827, now seen corresponding path program 30 times [2023-02-18 00:26:38,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:26:38,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523362551] [2023-02-18 00:26:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:26:38,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:26:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 105 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:38,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:38,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523362551] [2023-02-18 00:26:38,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523362551] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:38,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247645388] [2023-02-18 00:26:38,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:26:38,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:38,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:38,446 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:26:38,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2023-02-18 00:26:38,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-02-18 00:26:38,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:26:38,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:26:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:38,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:26:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:38,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247645388] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:26:38,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:26:38,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 23 [2023-02-18 00:26:38,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573107307] [2023-02-18 00:26:38,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:26:38,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 00:26:38,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:26:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 00:26:38,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2023-02-18 00:26:38,909 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:26:39,916 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2023-02-18 00:26:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 00:26:39,917 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-02-18 00:26:39,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:26:39,924 INFO L225 Difference]: With dead ends: 116 [2023-02-18 00:26:39,925 INFO L226 Difference]: Without dead ends: 114 [2023-02-18 00:26:39,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 94 SyntacticMatches, 62 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=1079, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 00:26:39,925 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 74 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:26:39,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 287 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:26:39,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-18 00:26:40,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2023-02-18 00:26:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:40,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2023-02-18 00:26:40,722 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 72 [2023-02-18 00:26:40,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:26:40,722 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2023-02-18 00:26:40,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:40,722 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2023-02-18 00:26:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:26:40,722 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:26:40,722 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:26:40,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2023-02-18 00:26:40,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:40,923 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:26:40,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:26:40,923 INFO L85 PathProgramCache]: Analyzing trace with hash -85712547, now seen corresponding path program 31 times [2023-02-18 00:26:40,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:26:40,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280362530] [2023-02-18 00:26:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:26:40,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:26:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:41,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:41,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280362530] [2023-02-18 00:26:41,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280362530] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:41,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279590384] [2023-02-18 00:26:41,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:26:41,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:41,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:41,335 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:26:41,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2023-02-18 00:26:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:41,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:26:41,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:42,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:26:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:42,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279590384] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:26:42,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:26:42,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 77 [2023-02-18 00:26:42,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909473755] [2023-02-18 00:26:42,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:26:42,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-02-18 00:26:42,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:26:42,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-02-18 00:26:42,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=4743, Unknown=0, NotChecked=0, Total=5852 [2023-02-18 00:26:42,382 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:44,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:26:44,743 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2023-02-18 00:26:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 00:26:44,743 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:26:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:26:44,749 INFO L225 Difference]: With dead ends: 233 [2023-02-18 00:26:44,749 INFO L226 Difference]: Without dead ends: 178 [2023-02-18 00:26:44,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 77 SyntacticMatches, 35 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6737 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2301, Invalid=10355, Unknown=0, NotChecked=0, Total=12656 [2023-02-18 00:26:44,750 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 81 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:26:44,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 388 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:26:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-18 00:26:45,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2023-02-18 00:26:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:26:45,608 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:26:45,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:26:45,608 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:26:45,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:45,608 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:26:45,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:26:45,608 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:26:45,608 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:26:45,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2023-02-18 00:26:45,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:45,808 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:26:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:26:45,809 INFO L85 PathProgramCache]: Analyzing trace with hash -266651492, now seen corresponding path program 106 times [2023-02-18 00:26:45,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:26:45,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002545087] [2023-02-18 00:26:45,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:26:45,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:26:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 346 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:46,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:46,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002545087] [2023-02-18 00:26:46,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002545087] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:46,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632899990] [2023-02-18 00:26:46,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:26:46,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:46,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:46,218 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:26:46,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2023-02-18 00:26:46,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:26:46,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:26:46,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:26:46,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:46,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:26:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:47,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632899990] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:26:47,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:26:47,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 76 [2023-02-18 00:26:47,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501650643] [2023-02-18 00:26:47,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:26:47,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-18 00:26:47,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:26:47,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-18 00:26:47,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=4643, Unknown=0, NotChecked=0, Total=5700 [2023-02-18 00:26:47,235 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 76 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:26:50,603 INFO L93 Difference]: Finished difference Result 302 states and 323 transitions. [2023-02-18 00:26:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-18 00:26:50,603 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:26:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:26:50,604 INFO L225 Difference]: With dead ends: 302 [2023-02-18 00:26:50,604 INFO L226 Difference]: Without dead ends: 247 [2023-02-18 00:26:50,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 77 SyntacticMatches, 36 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7952 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2822, Invalid=13434, Unknown=0, NotChecked=0, Total=16256 [2023-02-18 00:26:50,604 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 117 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:26:50,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 288 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:26:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-02-18 00:26:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 109. [2023-02-18 00:26:51,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:26:51,489 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:26:51,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:26:51,489 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:26:51,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:26:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:26:51,489 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:26:51,489 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:26:51,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2023-02-18 00:26:51,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:51,693 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:26:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:26:51,693 INFO L85 PathProgramCache]: Analyzing trace with hash 974437757, now seen corresponding path program 107 times [2023-02-18 00:26:51,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:26:51,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873141822] [2023-02-18 00:26:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:26:51,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:26:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 346 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:52,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:52,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873141822] [2023-02-18 00:26:52,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873141822] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:52,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944672774] [2023-02-18 00:26:52,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:26:52,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:52,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:52,097 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:26:52,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2023-02-18 00:26:52,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-02-18 00:26:52,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:26:52,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:26:52,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 392 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:52,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:26:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 392 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:53,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944672774] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:26:53,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:26:53,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 75 [2023-02-18 00:26:53,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958668986] [2023-02-18 00:26:53,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:26:53,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-02-18 00:26:53,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:26:53,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-02-18 00:26:53,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1009, Invalid=4541, Unknown=0, NotChecked=0, Total=5550 [2023-02-18 00:26:53,116 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:26:57,498 INFO L93 Difference]: Finished difference Result 370 states and 392 transitions. [2023-02-18 00:26:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-18 00:26:57,498 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:26:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:26:57,498 INFO L225 Difference]: With dead ends: 370 [2023-02-18 00:26:57,498 INFO L226 Difference]: Without dead ends: 315 [2023-02-18 00:26:57,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 77 SyntacticMatches, 37 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9166 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3380, Invalid=16360, Unknown=0, NotChecked=0, Total=19740 [2023-02-18 00:26:57,499 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 165 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:26:57,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 381 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:26:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-02-18 00:26:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 109. [2023-02-18 00:26:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:26:58,396 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:26:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:26:58,396 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:26:58,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:26:58,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:26:58,397 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:26:58,397 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:26:58,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2023-02-18 00:26:58,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:58,597 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:26:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:26:58,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1202284420, now seen corresponding path program 108 times [2023-02-18 00:26:58,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:26:58,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579644939] [2023-02-18 00:26:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:26:58,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:26:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 346 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:59,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:59,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579644939] [2023-02-18 00:26:59,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579644939] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:59,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858990581] [2023-02-18 00:26:59,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:26:59,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:59,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:59,004 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:26:59,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2023-02-18 00:26:59,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-02-18 00:26:59,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:26:59,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:26:59,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 392 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:59,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:26:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 392 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:59,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858990581] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:26:59,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:26:59,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 74 [2023-02-18 00:26:59,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974736244] [2023-02-18 00:26:59,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:26:59,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-18 00:26:59,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:26:59,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-18 00:26:59,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=965, Invalid=4437, Unknown=0, NotChecked=0, Total=5402 [2023-02-18 00:26:59,994 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:05,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:27:05,394 INFO L93 Difference]: Finished difference Result 437 states and 460 transitions. [2023-02-18 00:27:05,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-02-18 00:27:05,394 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:27:05,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:27:05,395 INFO L225 Difference]: With dead ends: 437 [2023-02-18 00:27:05,395 INFO L226 Difference]: Without dead ends: 382 [2023-02-18 00:27:05,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 77 SyntacticMatches, 38 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10310 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3918, Invalid=19034, Unknown=0, NotChecked=0, Total=22952 [2023-02-18 00:27:05,396 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 145 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:27:05,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 435 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:27:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-02-18 00:27:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 109. [2023-02-18 00:27:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:27:06,306 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:27:06,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:27:06,306 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:27:06,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:06,307 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:27:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:27:06,307 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:27:06,307 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:27:06,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2023-02-18 00:27:06,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:06,507 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:27:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:27:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash 251519389, now seen corresponding path program 109 times [2023-02-18 00:27:06,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:27:06,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237665326] [2023-02-18 00:27:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:27:06,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:27:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 346 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:06,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:27:06,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237665326] [2023-02-18 00:27:06,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237665326] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:27:06,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384641553] [2023-02-18 00:27:06,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:27:06,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:06,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:27:06,907 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:27:06,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2023-02-18 00:27:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:06,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:27:06,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:27:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 392 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:07,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:27:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 392 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:07,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384641553] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:27:07,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:27:07,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 73 [2023-02-18 00:27:07,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283429389] [2023-02-18 00:27:07,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:27:07,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-02-18 00:27:07,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:27:07,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-02-18 00:27:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=925, Invalid=4331, Unknown=0, NotChecked=0, Total=5256 [2023-02-18 00:27:07,875 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:27:14,213 INFO L93 Difference]: Finished difference Result 503 states and 527 transitions. [2023-02-18 00:27:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-18 00:27:14,213 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:27:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:27:14,214 INFO L225 Difference]: With dead ends: 503 [2023-02-18 00:27:14,214 INFO L226 Difference]: Without dead ends: 448 [2023-02-18 00:27:14,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 77 SyntacticMatches, 39 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11334 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4403, Invalid=21357, Unknown=0, NotChecked=0, Total=25760 [2023-02-18 00:27:14,215 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 273 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:27:14,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 373 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:27:14,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-02-18 00:27:15,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 109. [2023-02-18 00:27:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:27:15,166 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:27:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:27:15,166 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:27:15,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:27:15,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:27:15,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:27:15,166 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:27:15,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2023-02-18 00:27:15,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2023-02-18 00:27:15,367 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:27:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:27:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1918341028, now seen corresponding path program 110 times [2023-02-18 00:27:15,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:27:15,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132437138] [2023-02-18 00:27:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:27:15,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:27:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 346 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:15,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:27:15,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132437138] [2023-02-18 00:27:15,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132437138] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:27:15,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638740922] [2023-02-18 00:27:15,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:27:15,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:27:15,763 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:27:15,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2023-02-18 00:27:15,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:27:15,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:27:15,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:27:15,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:27:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 392 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:16,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:27:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 392 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:16,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638740922] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:27:16,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:27:16,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 72 [2023-02-18 00:27:16,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232473057] [2023-02-18 00:27:16,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:27:16,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-02-18 00:27:16,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:27:16,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-02-18 00:27:16,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=889, Invalid=4223, Unknown=0, NotChecked=0, Total=5112 [2023-02-18 00:27:16,726 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:23,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:27:23,990 INFO L93 Difference]: Finished difference Result 568 states and 593 transitions. [2023-02-18 00:27:23,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-02-18 00:27:23,990 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:27:23,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:27:23,990 INFO L225 Difference]: With dead ends: 568 [2023-02-18 00:27:23,990 INFO L226 Difference]: Without dead ends: 513 [2023-02-18 00:27:23,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 77 SyntacticMatches, 40 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12182 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4808, Invalid=23248, Unknown=0, NotChecked=0, Total=28056 [2023-02-18 00:27:23,991 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 287 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:27:23,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 424 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:27:23,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-02-18 00:27:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 109. [2023-02-18 00:27:24,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:27:24,924 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:27:24,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:27:24,924 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:27:24,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:24,924 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:27:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:27:24,924 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:27:24,924 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:27:24,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2023-02-18 00:27:25,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2023-02-18 00:27:25,125 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:27:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:27:25,125 INFO L85 PathProgramCache]: Analyzing trace with hash 505515453, now seen corresponding path program 111 times [2023-02-18 00:27:25,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:27:25,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105927946] [2023-02-18 00:27:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:27:25,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:27:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 346 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:25,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:27:25,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105927946] [2023-02-18 00:27:25,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105927946] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:27:25,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162568749] [2023-02-18 00:27:25,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:27:25,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:25,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:27:25,515 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:27:25,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2023-02-18 00:27:25,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-02-18 00:27:25,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:27:25,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:27:25,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:27:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 392 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:26,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:27:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 392 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:26,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162568749] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:27:26,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:27:26,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 71 [2023-02-18 00:27:26,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753126137] [2023-02-18 00:27:26,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:27:26,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-18 00:27:26,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:27:26,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-18 00:27:26,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=4113, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 00:27:26,466 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:27:34,595 INFO L93 Difference]: Finished difference Result 632 states and 658 transitions. [2023-02-18 00:27:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-02-18 00:27:34,595 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:27:34,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:27:34,596 INFO L225 Difference]: With dead ends: 632 [2023-02-18 00:27:34,596 INFO L226 Difference]: Without dead ends: 577 [2023-02-18 00:27:34,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 77 SyntacticMatches, 41 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12810 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5112, Invalid=24644, Unknown=0, NotChecked=0, Total=29756 [2023-02-18 00:27:34,597 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 391 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:27:34,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 498 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:27:34,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-02-18 00:27:35,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 109. [2023-02-18 00:27:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:27:35,541 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:27:35,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:27:35,541 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:27:35,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:27:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:27:35,541 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:27:35,541 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:27:35,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2023-02-18 00:27:35,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2023-02-18 00:27:35,742 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:27:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:27:35,742 INFO L85 PathProgramCache]: Analyzing trace with hash 860799036, now seen corresponding path program 112 times [2023-02-18 00:27:35,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:27:35,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234473693] [2023-02-18 00:27:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:27:35,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:27:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 346 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:36,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:27:36,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234473693] [2023-02-18 00:27:36,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234473693] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:27:36,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799540506] [2023-02-18 00:27:36,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:27:36,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:36,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:27:36,130 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:27:36,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2023-02-18 00:27:36,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:27:36,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:27:36,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:27:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:27:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 392 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:36,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:27:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 392 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:37,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799540506] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:27:37,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:27:37,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 70 [2023-02-18 00:27:37,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115507058] [2023-02-18 00:27:37,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:27:37,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-02-18 00:27:37,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:27:37,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-02-18 00:27:37,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=4001, Unknown=0, NotChecked=0, Total=4830 [2023-02-18 00:27:37,066 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 70 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:45,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:27:45,901 INFO L93 Difference]: Finished difference Result 695 states and 722 transitions. [2023-02-18 00:27:45,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-02-18 00:27:45,902 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 70 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:27:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:27:45,902 INFO L225 Difference]: With dead ends: 695 [2023-02-18 00:27:45,902 INFO L226 Difference]: Without dead ends: 640 [2023-02-18 00:27:45,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 77 SyntacticMatches, 42 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13186 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5300, Invalid=25500, Unknown=0, NotChecked=0, Total=30800 [2023-02-18 00:27:45,903 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 465 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:27:45,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 426 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:27:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2023-02-18 00:27:46,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 109. [2023-02-18 00:27:46,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:27:46,847 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:27:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:27:46,847 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:27:46,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 70 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:27:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:27:46,847 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:27:46,847 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:27:46,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2023-02-18 00:27:47,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:47,048 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:27:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:27:47,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1149354461, now seen corresponding path program 113 times [2023-02-18 00:27:47,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:27:47,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957594118] [2023-02-18 00:27:47,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:27:47,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:27:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 346 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:47,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:27:47,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957594118] [2023-02-18 00:27:47,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957594118] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:27:47,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481259439] [2023-02-18 00:27:47,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:27:47,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:47,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:27:47,440 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:27:47,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2023-02-18 00:27:47,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-02-18 00:27:47,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:27:47,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:27:47,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:27:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 392 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:48,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:27:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 392 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:48,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481259439] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:27:48,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:27:48,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 69 [2023-02-18 00:27:48,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423554291] [2023-02-18 00:27:48,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:27:48,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-18 00:27:48,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:27:48,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-18 00:27:48,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=3887, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 00:27:48,392 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:57,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:27:57,915 INFO L93 Difference]: Finished difference Result 757 states and 785 transitions. [2023-02-18 00:27:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-02-18 00:27:57,915 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:27:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:27:57,916 INFO L225 Difference]: With dead ends: 757 [2023-02-18 00:27:57,916 INFO L226 Difference]: Without dead ends: 702 [2023-02-18 00:27:57,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 77 SyntacticMatches, 43 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13290 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5363, Invalid=25789, Unknown=0, NotChecked=0, Total=31152 [2023-02-18 00:27:57,917 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 463 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:27:57,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 434 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:27:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-02-18 00:27:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 109. [2023-02-18 00:27:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:27:58,883 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:27:58,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:27:58,884 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:27:58,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:58,884 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:27:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:27:58,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:27:58,884 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:27:58,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2023-02-18 00:27:59,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:59,084 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:27:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:27:59,085 INFO L85 PathProgramCache]: Analyzing trace with hash 604473372, now seen corresponding path program 114 times [2023-02-18 00:27:59,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:27:59,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095709703] [2023-02-18 00:27:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:27:59,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:27:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 346 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:59,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:27:59,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095709703] [2023-02-18 00:27:59,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095709703] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:27:59,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327052055] [2023-02-18 00:27:59,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:27:59,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:59,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:27:59,478 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:27:59,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2023-02-18 00:27:59,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-02-18 00:27:59,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:27:59,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:27:59,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:28:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 392 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:00,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:28:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 392 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:00,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327052055] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:28:00,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:28:00,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 68 [2023-02-18 00:28:00,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510790926] [2023-02-18 00:28:00,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:28:00,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-18 00:28:00,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:28:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-18 00:28:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=3771, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 00:28:00,408 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:28:10,494 INFO L93 Difference]: Finished difference Result 818 states and 847 transitions. [2023-02-18 00:28:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-02-18 00:28:10,494 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:28:10,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:28:10,494 INFO L225 Difference]: With dead ends: 818 [2023-02-18 00:28:10,494 INFO L226 Difference]: Without dead ends: 763 [2023-02-18 00:28:10,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 77 SyntacticMatches, 44 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13113 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5298, Invalid=25502, Unknown=0, NotChecked=0, Total=30800 [2023-02-18 00:28:10,495 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 463 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:28:10,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 376 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:28:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2023-02-18 00:28:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 109. [2023-02-18 00:28:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:28:11,488 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:28:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:28:11,488 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:28:11,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:28:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:28:11,488 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:28:11,488 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:28:11,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2023-02-18 00:28:11,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2023-02-18 00:28:11,688 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:28:11,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:28:11,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1214218755, now seen corresponding path program 115 times [2023-02-18 00:28:11,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:28:11,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742213025] [2023-02-18 00:28:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:28:11,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:28:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:28:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 346 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:12,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:28:12,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742213025] [2023-02-18 00:28:12,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742213025] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:28:12,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309535637] [2023-02-18 00:28:12,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:28:12,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:28:12,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:28:12,080 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:28:12,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2023-02-18 00:28:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:28:12,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:28:12,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:28:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 392 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:12,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:28:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 392 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:12,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309535637] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:28:12,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:28:12,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 67 [2023-02-18 00:28:12,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725636312] [2023-02-18 00:28:12,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:28:12,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-18 00:28:12,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:28:12,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-18 00:28:12,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=3653, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 00:28:12,987 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 67 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:28:23,705 INFO L93 Difference]: Finished difference Result 878 states and 908 transitions. [2023-02-18 00:28:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-02-18 00:28:23,705 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 67 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:28:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:28:23,706 INFO L225 Difference]: With dead ends: 878 [2023-02-18 00:28:23,707 INFO L226 Difference]: Without dead ends: 823 [2023-02-18 00:28:23,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 77 SyntacticMatches, 45 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12652 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5108, Invalid=24648, Unknown=0, NotChecked=0, Total=29756 [2023-02-18 00:28:23,708 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 537 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:28:23,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 465 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:28:23,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2023-02-18 00:28:24,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 109. [2023-02-18 00:28:24,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:28:24,680 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:28:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:28:24,680 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:28:24,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 67 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:28:24,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:28:24,681 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:28:24,681 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:28:24,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2023-02-18 00:28:24,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:28:24,881 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:28:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:28:24,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1913702396, now seen corresponding path program 116 times [2023-02-18 00:28:24,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:28:24,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806990939] [2023-02-18 00:28:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:28:24,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:28:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:28:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 346 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:25,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:28:25,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806990939] [2023-02-18 00:28:25,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806990939] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:28:25,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629086913] [2023-02-18 00:28:25,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:28:25,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:28:25,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:28:25,269 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:28:25,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2023-02-18 00:28:25,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:28:25,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:28:25,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:28:25,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:28:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 392 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:25,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:28:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 392 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:26,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629086913] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:28:26,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:28:26,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 66 [2023-02-18 00:28:26,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681731182] [2023-02-18 00:28:26,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:28:26,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-18 00:28:26,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:28:26,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-18 00:28:26,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=3533, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 00:28:26,177 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:37,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:28:37,256 INFO L93 Difference]: Finished difference Result 937 states and 968 transitions. [2023-02-18 00:28:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-02-18 00:28:37,257 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:28:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:28:37,257 INFO L225 Difference]: With dead ends: 937 [2023-02-18 00:28:37,257 INFO L226 Difference]: Without dead ends: 882 [2023-02-18 00:28:37,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 77 SyntacticMatches, 46 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11915 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4802, Invalid=23254, Unknown=0, NotChecked=0, Total=28056 [2023-02-18 00:28:37,258 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 545 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:28:37,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 433 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:28:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2023-02-18 00:28:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 109. [2023-02-18 00:28:38,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:38,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:28:38,245 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:28:38,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:28:38,245 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:28:38,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:28:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:28:38,246 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:28:38,246 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:28:38,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2023-02-18 00:28:38,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:28:38,446 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:28:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:28:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash 629129757, now seen corresponding path program 117 times [2023-02-18 00:28:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:28:38,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807783308] [2023-02-18 00:28:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:28:38,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:28:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:28:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 346 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:38,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:28:38,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807783308] [2023-02-18 00:28:38,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807783308] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:28:38,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917179795] [2023-02-18 00:28:38,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:28:38,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:28:38,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:28:38,836 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:28:38,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2023-02-18 00:28:38,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-02-18 00:28:38,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:28:38,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:28:38,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:28:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 392 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:39,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:28:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 392 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:39,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917179795] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:28:39,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:28:39,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 65 [2023-02-18 00:28:39,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094059613] [2023-02-18 00:28:39,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:28:39,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-18 00:28:39,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:28:39,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-18 00:28:39,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3411, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 00:28:39,770 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:28:51,170 INFO L93 Difference]: Finished difference Result 995 states and 1027 transitions. [2023-02-18 00:28:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-02-18 00:28:51,171 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:28:51,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:28:51,171 INFO L225 Difference]: With dead ends: 995 [2023-02-18 00:28:51,171 INFO L226 Difference]: Without dead ends: 940 [2023-02-18 00:28:51,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 77 SyntacticMatches, 47 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10922 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4395, Invalid=21365, Unknown=0, NotChecked=0, Total=25760 [2023-02-18 00:28:51,172 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 768 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:28:51,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 354 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:28:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2023-02-18 00:28:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 109. [2023-02-18 00:28:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:28:52,159 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:28:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:28:52,159 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:28:52,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:28:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:28:52,159 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:28:52,159 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:28:52,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2023-02-18 00:28:52,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2023-02-18 00:28:52,359 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:28:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:28:52,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1490518052, now seen corresponding path program 118 times [2023-02-18 00:28:52,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:28:52,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549483086] [2023-02-18 00:28:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:28:52,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:28:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:28:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 346 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:52,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:28:52,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549483086] [2023-02-18 00:28:52,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549483086] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:28:52,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309310458] [2023-02-18 00:28:52,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:28:52,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:28:52,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:28:52,766 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:28:52,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2023-02-18 00:28:52,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:28:52,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:28:52,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:28:52,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:28:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 392 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:53,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:28:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 392 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:53,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309310458] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:28:53,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:28:53,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 64 [2023-02-18 00:28:53,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657907924] [2023-02-18 00:28:53,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:28:53,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-18 00:28:53,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:28:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-18 00:28:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=3287, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 00:28:53,654 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 64 states, 64 states have (on average 2.1875) internal successors, (140), 64 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:29:05,484 INFO L93 Difference]: Finished difference Result 1052 states and 1085 transitions. [2023-02-18 00:29:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-02-18 00:29:05,484 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.1875) internal successors, (140), 64 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:29:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:29:05,485 INFO L225 Difference]: With dead ends: 1052 [2023-02-18 00:29:05,485 INFO L226 Difference]: Without dead ends: 997 [2023-02-18 00:29:05,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 77 SyntacticMatches, 48 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9705 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3908, Invalid=19044, Unknown=0, NotChecked=0, Total=22952 [2023-02-18 00:29:05,486 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 749 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:29:05,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 330 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:29:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2023-02-18 00:29:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 109. [2023-02-18 00:29:06,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:06,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:29:06,489 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:29:06,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:29:06,489 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:29:06,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.1875) internal successors, (140), 64 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:06,489 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:29:06,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:29:06,490 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:29:06,490 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:29:06,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2023-02-18 00:29:06,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:29:06,690 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:29:06,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:29:06,690 INFO L85 PathProgramCache]: Analyzing trace with hash -727609795, now seen corresponding path program 119 times [2023-02-18 00:29:06,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:29:06,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684654654] [2023-02-18 00:29:06,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:06,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:29:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 346 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:07,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:29:07,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684654654] [2023-02-18 00:29:07,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684654654] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:29:07,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094639053] [2023-02-18 00:29:07,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:29:07,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:29:07,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:29:07,087 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:29:07,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2023-02-18 00:29:07,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-02-18 00:29:07,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:29:07,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:29:07,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:29:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 392 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:07,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:29:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 392 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:07,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094639053] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:29:07,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:29:07,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 63 [2023-02-18 00:29:07,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13337397] [2023-02-18 00:29:07,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:29:07,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-18 00:29:07,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:29:07,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-18 00:29:07,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=3161, Unknown=0, NotChecked=0, Total=3906 [2023-02-18 00:29:07,992 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:29:20,224 INFO L93 Difference]: Finished difference Result 1108 states and 1142 transitions. [2023-02-18 00:29:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-18 00:29:20,224 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:29:20,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:29:20,225 INFO L225 Difference]: With dead ends: 1108 [2023-02-18 00:29:20,225 INFO L226 Difference]: Without dead ends: 1053 [2023-02-18 00:29:20,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 77 SyntacticMatches, 49 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8308 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3368, Invalid=16372, Unknown=0, NotChecked=0, Total=19740 [2023-02-18 00:29:20,226 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 689 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:29:20,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 383 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:29:20,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2023-02-18 00:29:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 109. [2023-02-18 00:29:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:29:21,226 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:29:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:29:21,226 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:29:21,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:29:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:29:21,227 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:29:21,227 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:29:21,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2023-02-18 00:29:21,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2023-02-18 00:29:21,431 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:29:21,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:29:21,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1534283844, now seen corresponding path program 120 times [2023-02-18 00:29:21,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:29:21,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165553437] [2023-02-18 00:29:21,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:21,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:29:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 346 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:21,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:29:21,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165553437] [2023-02-18 00:29:21,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165553437] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:29:21,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115532347] [2023-02-18 00:29:21,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:29:21,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:29:21,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:29:21,824 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:29:21,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2023-02-18 00:29:21,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-02-18 00:29:21,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:29:21,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:29:21,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:29:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:22,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:29:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:22,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115532347] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:29:22,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:29:22,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 62 [2023-02-18 00:29:22,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542060266] [2023-02-18 00:29:22,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:29:22,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-18 00:29:22,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:29:22,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-18 00:29:22,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3033, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 00:29:22,718 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 62 states, 62 states have (on average 2.225806451612903) internal successors, (138), 62 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:35,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:29:35,307 INFO L93 Difference]: Finished difference Result 1163 states and 1198 transitions. [2023-02-18 00:29:35,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-02-18 00:29:35,307 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.225806451612903) internal successors, (138), 62 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:29:35,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:29:35,308 INFO L225 Difference]: With dead ends: 1163 [2023-02-18 00:29:35,308 INFO L226 Difference]: Without dead ends: 1108 [2023-02-18 00:29:35,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 77 SyntacticMatches, 50 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6751 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2808, Invalid=13448, Unknown=0, NotChecked=0, Total=16256 [2023-02-18 00:29:35,308 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 633 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:29:35,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 394 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:29:35,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2023-02-18 00:29:36,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 109. [2023-02-18 00:29:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-02-18 00:29:36,335 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2023-02-18 00:29:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:29:36,335 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-02-18 00:29:36,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.225806451612903) internal successors, (138), 62 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-02-18 00:29:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:29:36,335 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:29:36,335 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:29:36,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2023-02-18 00:29:36,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2023-02-18 00:29:36,535 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:29:36,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:29:36,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1006116259, now seen corresponding path program 16 times [2023-02-18 00:29:36,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:29:36,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017175668] [2023-02-18 00:29:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:36,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:29:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:36,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:29:36,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017175668] [2023-02-18 00:29:36,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017175668] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:29:36,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909786851] [2023-02-18 00:29:36,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:29:36,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:29:36,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:29:36,967 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:29:36,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2023-02-18 00:29:37,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:29:37,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:29:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:29:37,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:29:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:37,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:29:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:37,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909786851] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:29:37,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:29:37,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 61 [2023-02-18 00:29:37,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480917162] [2023-02-18 00:29:37,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:29:37,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-18 00:29:37,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:29:37,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-18 00:29:37,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=2903, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 00:29:37,858 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 61 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 61 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:29:50,882 INFO L93 Difference]: Finished difference Result 1220 states and 1257 transitions. [2023-02-18 00:29:50,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-18 00:29:50,882 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 61 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 00:29:50,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:29:50,883 INFO L225 Difference]: With dead ends: 1220 [2023-02-18 00:29:50,883 INFO L226 Difference]: Without dead ends: 1165 [2023-02-18 00:29:50,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 77 SyntacticMatches, 51 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5179 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2285, Invalid=10371, Unknown=0, NotChecked=0, Total=12656 [2023-02-18 00:29:50,883 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 581 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:29:50,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 367 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:29:50,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2023-02-18 00:29:51,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 111. [2023-02-18 00:29:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 110 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2023-02-18 00:29:51,948 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 75 [2023-02-18 00:29:51,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:29:51,949 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2023-02-18 00:29:51,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 61 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2023-02-18 00:29:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-18 00:29:51,949 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:29:51,949 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:29:51,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2023-02-18 00:29:52,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:29:52,149 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:29:52,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:29:52,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1801237463, now seen corresponding path program 32 times [2023-02-18 00:29:52,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:29:52,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974424967] [2023-02-18 00:29:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:52,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:29:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 120 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:52,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:29:52,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974424967] [2023-02-18 00:29:52,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974424967] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:29:52,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123965831] [2023-02-18 00:29:52,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:29:52,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:29:52,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:29:52,362 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:29:52,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2023-02-18 00:29:52,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:29:52,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:29:52,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:29:52,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:29:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:52,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:29:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:52,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123965831] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:29:52,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:29:52,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 24 [2023-02-18 00:29:52,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539656489] [2023-02-18 00:29:52,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:29:52,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 00:29:52,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:29:52,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 00:29:52,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2023-02-18 00:29:52,829 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:54,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:29:54,157 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2023-02-18 00:29:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 00:29:54,158 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-02-18 00:29:54,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:29:54,158 INFO L225 Difference]: With dead ends: 122 [2023-02-18 00:29:54,158 INFO L226 Difference]: Without dead ends: 120 [2023-02-18 00:29:54,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 99 SyntacticMatches, 66 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=620, Invalid=1186, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 00:29:54,158 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 112 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:29:54,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 270 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:29:54,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-18 00:29:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2023-02-18 00:29:55,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.176991150442478) internal successors, (133), 113 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 133 transitions. [2023-02-18 00:29:55,247 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 133 transitions. Word has length 76 [2023-02-18 00:29:55,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:29:55,247 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 133 transitions. [2023-02-18 00:29:55,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:55,247 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 133 transitions. [2023-02-18 00:29:55,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:29:55,247 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:29:55,247 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:29:55,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2023-02-18 00:29:55,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2023-02-18 00:29:55,448 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:29:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:29:55,448 INFO L85 PathProgramCache]: Analyzing trace with hash -651292871, now seen corresponding path program 33 times [2023-02-18 00:29:55,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:29:55,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533138056] [2023-02-18 00:29:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:55,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:29:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:55,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:29:55,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533138056] [2023-02-18 00:29:55,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533138056] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:29:55,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890340351] [2023-02-18 00:29:55,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:29:55,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:29:55,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:29:55,909 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:29:55,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2023-02-18 00:29:55,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-02-18 00:29:55,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:29:55,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:29:55,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:29:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:56,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:29:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:57,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890340351] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:29:57,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:29:57,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 81 [2023-02-18 00:29:57,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803772407] [2023-02-18 00:29:57,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:29:57,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-18 00:29:57,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:29:57,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-18 00:29:57,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=5253, Unknown=0, NotChecked=0, Total=6480 [2023-02-18 00:29:57,079 INFO L87 Difference]: Start difference. First operand 114 states and 133 transitions. Second operand has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:00,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:00,105 INFO L93 Difference]: Finished difference Result 246 states and 267 transitions. [2023-02-18 00:30:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 00:30:00,105 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-18 00:30:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:00,106 INFO L225 Difference]: With dead ends: 246 [2023-02-18 00:30:00,106 INFO L226 Difference]: Without dead ends: 188 [2023-02-18 00:30:00,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 81 SyntacticMatches, 37 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7521 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2542, Invalid=11500, Unknown=0, NotChecked=0, Total=14042 [2023-02-18 00:30:00,106 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 83 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:00,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 314 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:30:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-02-18 00:30:01,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2023-02-18 00:30:01,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:01,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-02-18 00:30:01,237 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2023-02-18 00:30:01,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:01,237 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-02-18 00:30:01,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-02-18 00:30:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:30:01,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:01,238 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:01,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:01,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:01,438 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:01,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:01,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1569100040, now seen corresponding path program 121 times [2023-02-18 00:30:01,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:01,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715176357] [2023-02-18 00:30:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:01,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 393 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:01,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:01,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715176357] [2023-02-18 00:30:01,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715176357] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:01,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226008081] [2023-02-18 00:30:01,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:30:01,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:01,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:01,888 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:30:01,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2023-02-18 00:30:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:01,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:30:01,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 442 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:02,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 442 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:03,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226008081] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:03,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:03,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 80 [2023-02-18 00:30:03,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144729930] [2023-02-18 00:30:03,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:03,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-02-18 00:30:03,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:03,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-02-18 00:30:03,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1172, Invalid=5148, Unknown=0, NotChecked=0, Total=6320 [2023-02-18 00:30:03,002 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 80 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:07,387 INFO L93 Difference]: Finished difference Result 319 states and 341 transitions. [2023-02-18 00:30:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 00:30:07,387 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 80 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-18 00:30:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:07,388 INFO L225 Difference]: With dead ends: 319 [2023-02-18 00:30:07,388 INFO L226 Difference]: Without dead ends: 261 [2023-02-18 00:30:07,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 81 SyntacticMatches, 38 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8898 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3130, Invalid=14960, Unknown=0, NotChecked=0, Total=18090 [2023-02-18 00:30:07,389 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 120 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:07,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 392 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:30:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-02-18 00:30:08,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 115. [2023-02-18 00:30:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-02-18 00:30:08,599 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2023-02-18 00:30:08,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:08,599 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-02-18 00:30:08,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 80 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:08,599 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-02-18 00:30:08,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:30:08,599 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:08,599 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:08,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2023-02-18 00:30:08,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2023-02-18 00:30:08,799 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:08,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:08,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1737254055, now seen corresponding path program 122 times [2023-02-18 00:30:08,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:08,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796066789] [2023-02-18 00:30:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:08,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 393 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:09,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:09,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796066789] [2023-02-18 00:30:09,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796066789] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:09,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330375833] [2023-02-18 00:30:09,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:30:09,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:09,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:09,259 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:30:09,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2023-02-18 00:30:09,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:30:09,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:09,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:30:09,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 442 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:09,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 442 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:10,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330375833] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:10,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:10,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 79 [2023-02-18 00:30:10,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029403316] [2023-02-18 00:30:10,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:10,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-02-18 00:30:10,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:10,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-02-18 00:30:10,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=5041, Unknown=0, NotChecked=0, Total=6162 [2023-02-18 00:30:10,382 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:16,076 INFO L93 Difference]: Finished difference Result 391 states and 414 transitions. [2023-02-18 00:30:16,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-02-18 00:30:16,076 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-18 00:30:16,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:16,077 INFO L225 Difference]: With dead ends: 391 [2023-02-18 00:30:16,077 INFO L226 Difference]: Without dead ends: 333 [2023-02-18 00:30:16,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 81 SyntacticMatches, 39 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10291 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3766, Invalid=18286, Unknown=0, NotChecked=0, Total=22052 [2023-02-18 00:30:16,078 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:16,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 304 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:30:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-02-18 00:30:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 115. [2023-02-18 00:30:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-02-18 00:30:17,270 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2023-02-18 00:30:17,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:17,270 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-02-18 00:30:17,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-02-18 00:30:17,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:30:17,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:17,271 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:17,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2023-02-18 00:30:17,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:17,471 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:17,471 INFO L85 PathProgramCache]: Analyzing trace with hash 474078936, now seen corresponding path program 123 times [2023-02-18 00:30:17,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:17,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799035406] [2023-02-18 00:30:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:17,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 393 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:17,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:17,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799035406] [2023-02-18 00:30:17,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799035406] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:17,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335837051] [2023-02-18 00:30:17,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:30:17,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:17,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:17,914 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:30:17,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2023-02-18 00:30:17,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-02-18 00:30:17,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:17,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:30:17,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 442 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:18,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 442 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:19,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335837051] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:19,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:19,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 78 [2023-02-18 00:30:19,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870862731] [2023-02-18 00:30:19,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:19,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-02-18 00:30:19,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:19,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-02-18 00:30:19,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1074, Invalid=4932, Unknown=0, NotChecked=0, Total=6006 [2023-02-18 00:30:19,013 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 78 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:25,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:25,998 INFO L93 Difference]: Finished difference Result 462 states and 486 transitions. [2023-02-18 00:30:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-18 00:30:25,999 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 78 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-18 00:30:25,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:25,999 INFO L225 Difference]: With dead ends: 462 [2023-02-18 00:30:25,999 INFO L226 Difference]: Without dead ends: 404 [2023-02-18 00:30:26,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 81 SyntacticMatches, 40 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11626 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4389, Invalid=21371, Unknown=0, NotChecked=0, Total=25760 [2023-02-18 00:30:26,000 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 207 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:26,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 360 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:30:26,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-02-18 00:30:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 115. [2023-02-18 00:30:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-02-18 00:30:27,224 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2023-02-18 00:30:27,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:27,224 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-02-18 00:30:27,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 78 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-02-18 00:30:27,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:30:27,224 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:27,224 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:27,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2023-02-18 00:30:27,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:27,424 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash -840061063, now seen corresponding path program 124 times [2023-02-18 00:30:27,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:27,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490959547] [2023-02-18 00:30:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:27,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 393 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:27,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:27,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490959547] [2023-02-18 00:30:27,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490959547] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:27,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819648981] [2023-02-18 00:30:27,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:30:27,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:27,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:27,862 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:30:27,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2023-02-18 00:30:27,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:30:27,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:27,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:30:27,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 442 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:28,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 442 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:28,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819648981] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:28,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:28,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 77 [2023-02-18 00:30:28,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180362934] [2023-02-18 00:30:28,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:28,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-02-18 00:30:28,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-02-18 00:30:28,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1031, Invalid=4821, Unknown=0, NotChecked=0, Total=5852 [2023-02-18 00:30:28,934 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:37,268 INFO L93 Difference]: Finished difference Result 532 states and 557 transitions. [2023-02-18 00:30:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-02-18 00:30:37,268 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-18 00:30:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:37,269 INFO L225 Difference]: With dead ends: 532 [2023-02-18 00:30:37,269 INFO L226 Difference]: Without dead ends: 474 [2023-02-18 00:30:37,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 81 SyntacticMatches, 41 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12848 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4963, Invalid=24107, Unknown=0, NotChecked=0, Total=29070 [2023-02-18 00:30:37,270 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 282 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:37,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 482 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:30:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-02-18 00:30:38,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 115. [2023-02-18 00:30:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-02-18 00:30:38,505 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2023-02-18 00:30:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:38,505 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-02-18 00:30:38,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:38,505 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-02-18 00:30:38,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:30:38,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:38,505 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:38,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2023-02-18 00:30:38,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2023-02-18 00:30:38,706 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:38,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1021000008, now seen corresponding path program 125 times [2023-02-18 00:30:38,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:38,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86486270] [2023-02-18 00:30:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:38,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 393 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:39,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:39,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86486270] [2023-02-18 00:30:39,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86486270] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:39,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590765307] [2023-02-18 00:30:39,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:30:39,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:39,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:39,150 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:30:39,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2023-02-18 00:30:39,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-02-18 00:30:39,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:39,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:30:39,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 442 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:39,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 442 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:40,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590765307] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:40,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:40,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 76 [2023-02-18 00:30:40,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607172629] [2023-02-18 00:30:40,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:40,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-18 00:30:40,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:40,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-18 00:30:40,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=4708, Unknown=0, NotChecked=0, Total=5700 [2023-02-18 00:30:40,212 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 76 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:49,676 INFO L93 Difference]: Finished difference Result 601 states and 627 transitions. [2023-02-18 00:30:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-02-18 00:30:49,676 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 76 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-18 00:30:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:49,676 INFO L225 Difference]: With dead ends: 601 [2023-02-18 00:30:49,676 INFO L226 Difference]: Without dead ends: 543 [2023-02-18 00:30:49,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 81 SyntacticMatches, 42 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13895 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5458, Invalid=26404, Unknown=0, NotChecked=0, Total=31862 [2023-02-18 00:30:49,678 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 297 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:49,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 403 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:30:49,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-02-18 00:30:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 115. [2023-02-18 00:30:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-02-18 00:30:50,923 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2023-02-18 00:30:50,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:50,923 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-02-18 00:30:50,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 76 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-02-18 00:30:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:30:50,924 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:50,924 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:50,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:51,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:51,124 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:51,124 INFO L85 PathProgramCache]: Analyzing trace with hash 220089241, now seen corresponding path program 126 times [2023-02-18 00:30:51,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:51,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055621260] [2023-02-18 00:30:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:51,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 393 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:51,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:51,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055621260] [2023-02-18 00:30:51,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055621260] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:51,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378280687] [2023-02-18 00:30:51,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:30:51,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:51,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:51,558 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:30:51,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2023-02-18 00:30:51,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2023-02-18 00:30:51,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:51,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:30:51,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 442 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:52,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 442 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:52,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378280687] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:52,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:52,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 75 [2023-02-18 00:30:52,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666726139] [2023-02-18 00:30:52,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:52,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-02-18 00:30:52,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:52,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-02-18 00:30:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=4593, Unknown=0, NotChecked=0, Total=5550 [2023-02-18 00:30:52,621 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:03,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:03,218 INFO L93 Difference]: Finished difference Result 669 states and 696 transitions. [2023-02-18 00:31:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-02-18 00:31:03,218 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-18 00:31:03,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:03,218 INFO L225 Difference]: With dead ends: 669 [2023-02-18 00:31:03,218 INFO L226 Difference]: Without dead ends: 611 [2023-02-18 00:31:03,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 81 SyntacticMatches, 43 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14717 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5850, Invalid=28190, Unknown=0, NotChecked=0, Total=34040 [2023-02-18 00:31:03,220 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 568 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:03,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 343 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:31:03,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2023-02-18 00:31:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 115. [2023-02-18 00:31:04,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-02-18 00:31:04,482 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2023-02-18 00:31:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:04,483 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-02-18 00:31:04,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-02-18 00:31:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:31:04,483 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:04,483 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:04,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2023-02-18 00:31:04,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:04,683 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:04,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1956632936, now seen corresponding path program 127 times [2023-02-18 00:31:04,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:04,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895138585] [2023-02-18 00:31:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:04,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 393 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:05,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:05,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895138585] [2023-02-18 00:31:05,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895138585] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:05,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240239043] [2023-02-18 00:31:05,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:31:05,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:05,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:05,117 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:31:05,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2023-02-18 00:31:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:05,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:31:05,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 442 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:05,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 442 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:06,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240239043] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:06,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:06,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 74 [2023-02-18 00:31:06,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806671901] [2023-02-18 00:31:06,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:06,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-18 00:31:06,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:06,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-18 00:31:06,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=4476, Unknown=0, NotChecked=0, Total=5402 [2023-02-18 00:31:06,137 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 74 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:17,759 INFO L93 Difference]: Finished difference Result 736 states and 764 transitions. [2023-02-18 00:31:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-02-18 00:31:17,759 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 74 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-18 00:31:17,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:17,760 INFO L225 Difference]: With dead ends: 736 [2023-02-18 00:31:17,760 INFO L226 Difference]: Without dead ends: 678 [2023-02-18 00:31:17,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 81 SyntacticMatches, 44 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15276 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6121, Invalid=29411, Unknown=0, NotChecked=0, Total=35532 [2023-02-18 00:31:17,761 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 505 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:17,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 431 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:31:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2023-02-18 00:31:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 115. [2023-02-18 00:31:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-02-18 00:31:19,045 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2023-02-18 00:31:19,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:19,045 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-02-18 00:31:19,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 74 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-02-18 00:31:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:31:19,045 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:19,045 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:19,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2023-02-18 00:31:19,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:19,246 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:19,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:19,246 INFO L85 PathProgramCache]: Analyzing trace with hash -502829127, now seen corresponding path program 128 times [2023-02-18 00:31:19,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:19,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856740369] [2023-02-18 00:31:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:19,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 393 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:19,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:19,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856740369] [2023-02-18 00:31:19,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856740369] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:19,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616527151] [2023-02-18 00:31:19,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:31:19,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:19,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:19,673 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:31:19,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2023-02-18 00:31:19,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:31:19,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:19,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:31:19,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 442 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:20,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 442 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:20,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616527151] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:20,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:20,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 73 [2023-02-18 00:31:20,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786640587] [2023-02-18 00:31:20,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:20,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-02-18 00:31:20,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:20,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-02-18 00:31:20,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=4357, Unknown=0, NotChecked=0, Total=5256 [2023-02-18 00:31:20,685 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:33,216 INFO L93 Difference]: Finished difference Result 802 states and 831 transitions. [2023-02-18 00:31:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2023-02-18 00:31:33,216 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-18 00:31:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:33,216 INFO L225 Difference]: With dead ends: 802 [2023-02-18 00:31:33,216 INFO L226 Difference]: Without dead ends: 744 [2023-02-18 00:31:33,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 81 SyntacticMatches, 45 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15546 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6259, Invalid=30031, Unknown=0, NotChecked=0, Total=36290 [2023-02-18 00:31:33,218 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 402 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:33,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 457 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:31:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2023-02-18 00:31:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 115. [2023-02-18 00:31:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-02-18 00:31:34,506 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2023-02-18 00:31:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:34,506 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-02-18 00:31:34,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-02-18 00:31:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:31:34,507 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:34,507 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:34,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2023-02-18 00:31:34,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2023-02-18 00:31:34,707 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:34,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:34,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1622277752, now seen corresponding path program 129 times [2023-02-18 00:31:34,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:34,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700975587] [2023-02-18 00:31:34,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:34,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 393 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:35,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:35,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700975587] [2023-02-18 00:31:35,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700975587] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:35,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850673409] [2023-02-18 00:31:35,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:31:35,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:35,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:35,133 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:31:35,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2023-02-18 00:31:35,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-02-18 00:31:35,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:35,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:31:35,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 442 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:35,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 442 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:36,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850673409] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:36,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:36,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 72 [2023-02-18 00:31:36,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596543515] [2023-02-18 00:31:36,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:36,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-02-18 00:31:36,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:36,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-02-18 00:31:36,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=4236, Unknown=0, NotChecked=0, Total=5112 [2023-02-18 00:31:36,145 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:49,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:49,523 INFO L93 Difference]: Finished difference Result 867 states and 897 transitions. [2023-02-18 00:31:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2023-02-18 00:31:49,523 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-18 00:31:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:49,524 INFO L225 Difference]: With dead ends: 867 [2023-02-18 00:31:49,524 INFO L226 Difference]: Without dead ends: 809 [2023-02-18 00:31:49,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 81 SyntacticMatches, 46 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15513 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6258, Invalid=30032, Unknown=0, NotChecked=0, Total=36290 [2023-02-18 00:31:49,525 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 871 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:49,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 392 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:31:49,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2023-02-18 00:31:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 115. [2023-02-18 00:31:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-02-18 00:31:50,816 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2023-02-18 00:31:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:50,816 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-02-18 00:31:50,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-02-18 00:31:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:31:50,816 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:50,816 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:50,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2023-02-18 00:31:51,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2023-02-18 00:31:51,017 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:51,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:51,017 INFO L85 PathProgramCache]: Analyzing trace with hash -248833063, now seen corresponding path program 130 times [2023-02-18 00:31:51,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:51,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337712879] [2023-02-18 00:31:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:51,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 393 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:51,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:51,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337712879] [2023-02-18 00:31:51,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337712879] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:51,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433012751] [2023-02-18 00:31:51,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:31:51,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:51,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:51,436 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:31:51,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2023-02-18 00:31:51,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:31:51,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:51,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:31:51,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 442 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:52,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 442 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:52,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433012751] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:52,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:52,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 71 [2023-02-18 00:31:52,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601768770] [2023-02-18 00:31:52,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:52,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-18 00:31:52,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:52,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-18 00:31:52,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=4113, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 00:31:52,417 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 71 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:32:06,466 INFO L93 Difference]: Finished difference Result 931 states and 962 transitions. [2023-02-18 00:32:06,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2023-02-18 00:32:06,466 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 71 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-18 00:32:06,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:32:06,467 INFO L225 Difference]: With dead ends: 931 [2023-02-18 00:32:06,467 INFO L226 Difference]: Without dead ends: 873 [2023-02-18 00:32:06,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 81 SyntacticMatches, 47 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15171 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6118, Invalid=29414, Unknown=0, NotChecked=0, Total=35532 [2023-02-18 00:32:06,468 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 598 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:32:06,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 374 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:32:06,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2023-02-18 00:32:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 115. [2023-02-18 00:32:07,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-02-18 00:32:07,768 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2023-02-18 00:32:07,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:32:07,768 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-02-18 00:32:07,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 71 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-02-18 00:32:07,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:32:07,768 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:32:07,769 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:32:07,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2023-02-18 00:32:07,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:32:07,972 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:32:07,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:32:07,972 INFO L85 PathProgramCache]: Analyzing trace with hash 106450520, now seen corresponding path program 131 times [2023-02-18 00:32:07,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:32:07,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625720905] [2023-02-18 00:32:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:32:07,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:32:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 393 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:08,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:32:08,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625720905] [2023-02-18 00:32:08,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625720905] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:32:08,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170543726] [2023-02-18 00:32:08,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:32:08,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:32:08,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:32:08,400 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:32:08,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2023-02-18 00:32:08,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-02-18 00:32:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:32:08,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:32:08,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:32:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 442 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:09,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:32:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 442 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:09,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170543726] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:32:09,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:32:09,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 70 [2023-02-18 00:32:09,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763258702] [2023-02-18 00:32:09,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:32:09,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-02-18 00:32:09,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:32:09,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-02-18 00:32:09,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=3988, Unknown=0, NotChecked=0, Total=4830 [2023-02-18 00:32:09,412 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 70 states, 70 states have (on average 2.142857142857143) internal successors, (150), 70 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:32:24,180 INFO L93 Difference]: Finished difference Result 994 states and 1026 transitions. [2023-02-18 00:32:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2023-02-18 00:32:24,180 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.142857142857143) internal successors, (150), 70 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-18 00:32:24,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:32:24,181 INFO L225 Difference]: With dead ends: 994 [2023-02-18 00:32:24,181 INFO L226 Difference]: Without dead ends: 936 [2023-02-18 00:32:24,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 81 SyntacticMatches, 48 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14522 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5845, Invalid=28195, Unknown=0, NotChecked=0, Total=34040 [2023-02-18 00:32:24,182 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 503 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:32:24,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 463 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:32:24,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2023-02-18 00:32:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 115. [2023-02-18 00:32:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-02-18 00:32:25,532 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2023-02-18 00:32:25,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:32:25,532 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-02-18 00:32:25,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.142857142857143) internal successors, (150), 70 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-02-18 00:32:25,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:32:25,533 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:32:25,533 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:32:25,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2023-02-18 00:32:25,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2023-02-18 00:32:25,733 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:32:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:32:25,734 INFO L85 PathProgramCache]: Analyzing trace with hash 395005945, now seen corresponding path program 132 times [2023-02-18 00:32:25,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:32:25,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161630297] [2023-02-18 00:32:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:32:25,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:32:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 393 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:26,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:32:26,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161630297] [2023-02-18 00:32:26,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161630297] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:32:26,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968389766] [2023-02-18 00:32:26,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:32:26,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:32:26,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:32:26,163 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:32:26,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2023-02-18 00:32:26,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2023-02-18 00:32:26,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:32:26,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:32:26,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:32:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 442 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:26,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:32:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 442 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:27,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968389766] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:32:27,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:32:27,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 69 [2023-02-18 00:32:27,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127956819] [2023-02-18 00:32:27,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:32:27,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-18 00:32:27,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:32:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-18 00:32:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=3861, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 00:32:27,172 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 69 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:32:42,462 INFO L93 Difference]: Finished difference Result 1056 states and 1089 transitions. [2023-02-18 00:32:42,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-02-18 00:32:42,462 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 69 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-18 00:32:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:32:42,463 INFO L225 Difference]: With dead ends: 1056 [2023-02-18 00:32:42,463 INFO L226 Difference]: Without dead ends: 998 [2023-02-18 00:32:42,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 81 SyntacticMatches, 49 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13580 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5451, Invalid=26411, Unknown=0, NotChecked=0, Total=31862 [2023-02-18 00:32:42,465 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 570 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:32:42,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 437 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:32:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2023-02-18 00:32:43,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 115. [2023-02-18 00:32:43,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2023-02-18 00:32:43,782 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 79 [2023-02-18 00:32:43,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:32:43,782 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2023-02-18 00:32:43,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 69 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2023-02-18 00:32:43,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:32:43,782 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:32:43,782 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:32:43,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2023-02-18 00:32:43,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:32:43,982 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:32:43,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:32:43,983 INFO L85 PathProgramCache]: Analyzing trace with hash -149875144, now seen corresponding path program 133 times [2023-02-18 00:32:43,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:32:43,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392085677] [2023-02-18 00:32:43,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:32:43,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:32:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 393 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:44,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:32:44,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392085677] [2023-02-18 00:32:44,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392085677] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:32:44,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332729398] [2023-02-18 00:32:44,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:32:44,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:32:44,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:32:44,413 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:32:44,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2023-02-18 00:32:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:44,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:32:44,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:32:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 442 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:45,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:32:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 442 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:45,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332729398] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:32:45,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:32:45,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 68 [2023-02-18 00:32:45,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770232452] [2023-02-18 00:32:45,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:32:45,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-18 00:32:45,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:32:45,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-18 00:32:45,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=3732, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 00:32:45,413 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 68 states, 68 states have (on average 2.176470588235294) internal successors, (148), 68 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)