./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/up.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/up.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 ff5c10c83c8d29dcc2c2798035fa2754df224d2313ad9c91b6ee5bb6ca3d9a9f --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 00:19:08,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 00:19:08,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 00:19:08,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 00:19:08,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 00:19:08,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 00:19:08,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 00:19:08,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 00:19:08,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 00:19:08,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 00:19:08,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 00:19:08,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 00:19:08,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 00:19:08,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 00:19:08,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 00:19:08,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 00:19:08,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 00:19:08,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 00:19:08,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 00:19:08,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 00:19:08,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 00:19:08,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 00:19:08,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 00:19:08,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 00:19:08,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 00:19:08,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 00:19:08,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 00:19:08,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 00:19:08,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 00:19:08,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 00:19:08,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 00:19:08,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 00:19:08,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 00:19:08,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 00:19:08,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 00:19:08,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 00:19:08,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 00:19:08,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 00:19:08,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 00:19:08,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 00:19:08,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 00:19:08,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 00:19:08,613 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 00:19:08,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 00:19:08,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 00:19:08,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 00:19:08,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 00:19:08,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 00:19:08,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 00:19:08,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 00:19:08,616 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 00:19:08,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 00:19:08,616 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 00:19:08,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 00:19:08,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 00:19:08,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 00:19:08,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 00:19:08,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 00:19:08,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 00:19:08,617 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 00:19:08,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 00:19:08,618 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 00:19:08,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 00:19:08,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 00:19:08,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 00:19:08,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 00:19:08,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:19:08,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 00:19:08,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 00:19:08,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 00:19:08,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 00:19:08,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 00:19:08,619 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 00:19:08,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 00:19:08,620 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 00:19:08,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 00:19:08,620 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 00:19:08,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5c10c83c8d29dcc2c2798035fa2754df224d2313ad9c91b6ee5bb6ca3d9a9f [2023-02-18 00:19:08,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 00:19:08,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 00:19:08,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 00:19:08,822 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 00:19:08,822 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 00:19:08,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/up.i [2023-02-18 00:19:09,882 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 00:19:10,025 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 00:19:10,026 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/up.i [2023-02-18 00:19:10,030 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/defac742b/0a7a5e5aab584653a5fdb537b3c68211/FLAG58e1f7b27 [2023-02-18 00:19:10,039 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/defac742b/0a7a5e5aab584653a5fdb537b3c68211 [2023-02-18 00:19:10,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 00:19:10,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 00:19:10,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 00:19:10,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 00:19:10,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 00:19:10,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:19:10" (1/1) ... [2023-02-18 00:19:10,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d3f8dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10, skipping insertion in model container [2023-02-18 00:19:10,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:19:10" (1/1) ... [2023-02-18 00:19:10,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 00:19:10,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 00:19:10,143 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/up.i[893,906] [2023-02-18 00:19:10,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:19:10,155 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 00:19:10,163 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/up.i[893,906] [2023-02-18 00:19:10,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:19:10,172 INFO L208 MainTranslator]: Completed translation [2023-02-18 00:19:10,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10 WrapperNode [2023-02-18 00:19:10,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 00:19:10,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 00:19:10,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 00:19:10,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 00:19:10,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10" (1/1) ... [2023-02-18 00:19:10,182 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10" (1/1) ... [2023-02-18 00:19:10,194 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2023-02-18 00:19:10,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 00:19:10,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 00:19:10,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 00:19:10,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 00:19:10,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10" (1/1) ... [2023-02-18 00:19:10,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10" (1/1) ... [2023-02-18 00:19:10,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10" (1/1) ... [2023-02-18 00:19:10,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10" (1/1) ... [2023-02-18 00:19:10,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10" (1/1) ... [2023-02-18 00:19:10,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10" (1/1) ... [2023-02-18 00:19:10,205 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10" (1/1) ... [2023-02-18 00:19:10,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10" (1/1) ... [2023-02-18 00:19:10,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 00:19:10,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 00:19:10,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 00:19:10,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 00:19:10,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10" (1/1) ... [2023-02-18 00:19:10,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:19:10,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:10,227 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 00:19:10,242 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 00:19:10,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 00:19:10,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 00:19:10,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 00:19:10,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 00:19:10,303 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 00:19:10,304 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 00:19:10,421 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 00:19:10,424 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 00:19:10,426 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 00:19:10,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:19:10 BoogieIcfgContainer [2023-02-18 00:19:10,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 00:19:10,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 00:19:10,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 00:19:10,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 00:19:10,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 12:19:10" (1/3) ... [2023-02-18 00:19:10,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cdc884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:19:10, skipping insertion in model container [2023-02-18 00:19:10,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:19:10" (2/3) ... [2023-02-18 00:19:10,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cdc884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:19:10, skipping insertion in model container [2023-02-18 00:19:10,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:19:10" (3/3) ... [2023-02-18 00:19:10,434 INFO L112 eAbstractionObserver]: Analyzing ICFG up.i [2023-02-18 00:19:10,446 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 00:19:10,446 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 00:19:10,487 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 00:19:10,493 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;@1584c196, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 00:19:10,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 00:19:10,497 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 00:19:10,502 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:10,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:10,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1808851121, now seen corresponding path program 1 times [2023-02-18 00:19:10,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:10,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104514811] [2023-02-18 00:19:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:10,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:10,695 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 00:19:10,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:10,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104514811] [2023-02-18 00:19:10,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104514811] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:19:10,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:19:10,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 00:19:10,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904755053] [2023-02-18 00:19:10,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:19:10,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 00:19:10,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:10,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 00:19:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 00:19:10,749 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:10,783 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2023-02-18 00:19:10,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 00:19:10,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 00:19:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:10,791 INFO L225 Difference]: With dead ends: 27 [2023-02-18 00:19:10,791 INFO L226 Difference]: Without dead ends: 10 [2023-02-18 00:19:10,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-18 00:19:10,796 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:10,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 28 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:10,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-02-18 00:19:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-02-18 00:19:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-02-18 00:19:10,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2023-02-18 00:19:10,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:10,817 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-02-18 00:19:10,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:10,817 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-02-18 00:19:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 00:19:10,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:10,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:10,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 00:19:10,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash 291256044, now seen corresponding path program 1 times [2023-02-18 00:19:10,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:10,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779601564] [2023-02-18 00:19:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:10,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:10,887 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 00:19:10,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:10,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779601564] [2023-02-18 00:19:10,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779601564] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:10,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036602108] [2023-02-18 00:19:10,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:10,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:10,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:10,905 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 00:19:10,908 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 00:19:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:10,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 00:19:10,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:10,985 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 00:19:10,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 00:19:10,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036602108] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:19:10,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 00:19:10,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-02-18 00:19:10,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271328029] [2023-02-18 00:19:10,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:19:10,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 00:19:10,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:10,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 00:19:10,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 00:19:10,988 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:11,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:11,008 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2023-02-18 00:19:11,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 00:19:11,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 00:19:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:11,009 INFO L225 Difference]: With dead ends: 20 [2023-02-18 00:19:11,009 INFO L226 Difference]: Without dead ends: 18 [2023-02-18 00:19:11,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:19:11,013 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:11,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:11,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-18 00:19:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2023-02-18 00:19:11,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-02-18 00:19:11,022 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2023-02-18 00:19:11,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:11,022 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-02-18 00:19:11,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:11,026 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-02-18 00:19:11,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 00:19:11,026 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:11,026 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:11,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 00:19:11,231 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 00:19:11,232 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash 979689165, now seen corresponding path program 1 times [2023-02-18 00:19:11,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:11,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006071352] [2023-02-18 00:19:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:11,299 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 00:19:11,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:11,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006071352] [2023-02-18 00:19:11,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006071352] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:11,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332605103] [2023-02-18 00:19:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:11,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:11,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:11,313 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 00:19:11,316 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 00:19:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:11,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 00:19:11,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:11,366 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 00:19:11,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:11,389 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 00:19:11,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332605103] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:11,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:11,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-18 00:19:11,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759910191] [2023-02-18 00:19:11,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:11,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 00:19:11,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:11,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 00:19:11,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-18 00:19:11,392 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 00:19:11,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:11,422 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2023-02-18 00:19:11,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 00:19:11,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) Word has length 11 [2023-02-18 00:19:11,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:11,423 INFO L225 Difference]: With dead ends: 23 [2023-02-18 00:19:11,423 INFO L226 Difference]: Without dead ends: 13 [2023-02-18 00:19:11,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-18 00:19:11,424 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:11,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 33 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-18 00:19:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-18 00:19:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-02-18 00:19:11,426 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2023-02-18 00:19:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:11,427 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-02-18 00:19:11,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 00:19:11,427 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-02-18 00:19:11,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 00:19:11,427 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:11,428 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:11,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 00:19:11,636 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 00:19:11,638 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:11,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:11,638 INFO L85 PathProgramCache]: Analyzing trace with hash -510353528, now seen corresponding path program 2 times [2023-02-18 00:19:11,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:11,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635439954] [2023-02-18 00:19:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:11,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:11,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:11,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635439954] [2023-02-18 00:19:11,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635439954] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:11,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552527211] [2023-02-18 00:19:11,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:11,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:11,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:11,792 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 00:19:11,795 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 00:19:11,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:11,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:11,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 00:19:11,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:11,844 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 00:19:11,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:11,860 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 00:19:11,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552527211] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:11,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:11,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-02-18 00:19:11,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115002778] [2023-02-18 00:19:11,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:11,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 00:19:11,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:11,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 00:19:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-18 00:19:11,863 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:11,905 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-02-18 00:19:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 00:19:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 00:19:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:11,906 INFO L225 Difference]: With dead ends: 24 [2023-02-18 00:19:11,906 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 00:19:11,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-02-18 00:19:11,907 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:11,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 28 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:11,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 00:19:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2023-02-18 00:19:11,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-02-18 00:19:11,911 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2023-02-18 00:19:11,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:11,911 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-02-18 00:19:11,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:11,912 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-02-18 00:19:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 00:19:11,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:11,912 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:11,928 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 00:19:12,117 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 00:19:12,117 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:12,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:12,118 INFO L85 PathProgramCache]: Analyzing trace with hash 247095473, now seen corresponding path program 3 times [2023-02-18 00:19:12,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:12,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213003911] [2023-02-18 00:19:12,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:12,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:12,188 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 00:19:12,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:12,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213003911] [2023-02-18 00:19:12,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213003911] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:12,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874086537] [2023-02-18 00:19:12,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:12,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:12,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:12,190 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 00:19:12,192 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 00:19:12,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 00:19:12,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:12,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 00:19:12,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:12,287 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 00:19:12,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:12,334 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 00:19:12,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874086537] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:12,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:12,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-18 00:19:12,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029612234] [2023-02-18 00:19:12,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:12,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 00:19:12,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:12,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 00:19:12,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-02-18 00:19:12,336 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 00:19:12,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:12,391 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-02-18 00:19:12,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 00:19:12,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 15 [2023-02-18 00:19:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:12,392 INFO L225 Difference]: With dead ends: 30 [2023-02-18 00:19:12,392 INFO L226 Difference]: Without dead ends: 17 [2023-02-18 00:19:12,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:19:12,394 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:12,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:12,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-18 00:19:12,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-18 00:19:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-02-18 00:19:12,404 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-02-18 00:19:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:12,404 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-02-18 00:19:12,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 00:19:12,405 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-02-18 00:19:12,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 00:19:12,405 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:12,405 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:12,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 00:19:12,610 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 00:19:12,610 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:12,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:12,611 INFO L85 PathProgramCache]: Analyzing trace with hash 576015340, now seen corresponding path program 4 times [2023-02-18 00:19:12,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:12,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133763415] [2023-02-18 00:19:12,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:12,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:12,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:12,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133763415] [2023-02-18 00:19:12,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133763415] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:12,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204496984] [2023-02-18 00:19:12,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:12,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:12,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:12,667 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 00:19:12,697 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 00:19:12,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:12,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:12,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 00:19:12,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:12,764 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 00:19:12,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:12,788 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 00:19:12,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204496984] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:12,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:12,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-02-18 00:19:12,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215812571] [2023-02-18 00:19:12,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:12,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 00:19:12,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:12,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 00:19:12,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:19:12,790 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:12,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:12,837 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-02-18 00:19:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 00:19:12,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 00:19:12,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:12,840 INFO L225 Difference]: With dead ends: 28 [2023-02-18 00:19:12,840 INFO L226 Difference]: Without dead ends: 26 [2023-02-18 00:19:12,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-18 00:19:12,842 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:12,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:12,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-18 00:19:12,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2023-02-18 00:19:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 00:19:12,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-02-18 00:19:12,847 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2023-02-18 00:19:12,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:12,848 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-02-18 00:19:12,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-02-18 00:19:12,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 00:19:12,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:12,849 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:12,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:13,054 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 00:19:13,055 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:13,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:13,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1683466701, now seen corresponding path program 5 times [2023-02-18 00:19:13,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:13,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012708637] [2023-02-18 00:19:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:13,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:13,117 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 00:19:13,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:13,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012708637] [2023-02-18 00:19:13,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012708637] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:13,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931892381] [2023-02-18 00:19:13,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:13,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:13,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:13,134 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 00:19:13,137 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 00:19:13,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 00:19:13,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:13,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 00:19:13,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:13,214 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 00:19:13,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:13,254 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 00:19:13,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931892381] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:13,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:13,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-18 00:19:13,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904844300] [2023-02-18 00:19:13,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:13,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 00:19:13,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:13,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 00:19:13,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-02-18 00:19:13,256 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 00:19:13,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:13,303 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-02-18 00:19:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 00:19:13,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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) Word has length 19 [2023-02-18 00:19:13,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:13,303 INFO L225 Difference]: With dead ends: 37 [2023-02-18 00:19:13,303 INFO L226 Difference]: Without dead ends: 21 [2023-02-18 00:19:13,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2023-02-18 00:19:13,304 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:13,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:13,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-18 00:19:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-18 00:19:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-02-18 00:19:13,307 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-02-18 00:19:13,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:13,307 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-02-18 00:19:13,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 00:19:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-02-18 00:19:13,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 00:19:13,308 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:13,308 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:13,315 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 00:19:13,512 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 00:19:13,513 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:13,513 INFO L85 PathProgramCache]: Analyzing trace with hash 230981512, now seen corresponding path program 6 times [2023-02-18 00:19:13,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:13,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002343795] [2023-02-18 00:19:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:13,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:13,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:13,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002343795] [2023-02-18 00:19:13,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002343795] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:13,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601787746] [2023-02-18 00:19:13,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:13,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:13,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:13,610 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 00:19:13,625 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 00:19:13,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 00:19:13,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:13,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:19:13,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:13,684 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 00:19:13,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:13,722 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 00:19:13,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601787746] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:13,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:13,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2023-02-18 00:19:13,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116180255] [2023-02-18 00:19:13,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:13,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 00:19:13,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:13,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 00:19:13,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-18 00:19:13,723 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 00:19:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:13,764 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2023-02-18 00:19:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 00:19:13,765 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) Word has length 20 [2023-02-18 00:19:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:13,765 INFO L225 Difference]: With dead ends: 32 [2023-02-18 00:19:13,765 INFO L226 Difference]: Without dead ends: 30 [2023-02-18 00:19:13,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 14 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2023-02-18 00:19:13,766 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:13,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 23 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-18 00:19:13,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2023-02-18 00:19:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 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 00:19:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-02-18 00:19:13,769 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2023-02-18 00:19:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:13,769 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-02-18 00:19:13,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 00:19:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-02-18 00:19:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 00:19:13,770 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:13,770 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:13,788 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 00:19:13,974 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 00:19:13,975 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:13,975 INFO L85 PathProgramCache]: Analyzing trace with hash 637436081, now seen corresponding path program 7 times [2023-02-18 00:19:13,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:13,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41805354] [2023-02-18 00:19:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:13,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:14,042 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 00:19:14,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:14,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41805354] [2023-02-18 00:19:14,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41805354] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:14,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534962337] [2023-02-18 00:19:14,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:14,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:14,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:14,044 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 00:19:14,046 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 00:19:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:14,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 00:19:14,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:14,142 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 00:19:14,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:14,188 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 00:19:14,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534962337] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:14,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:14,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-02-18 00:19:14,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470526401] [2023-02-18 00:19:14,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:14,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 00:19:14,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:14,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 00:19:14,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-02-18 00:19:14,190 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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 00:19:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:14,253 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-02-18 00:19:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 00:19:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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) Word has length 23 [2023-02-18 00:19:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:14,254 INFO L225 Difference]: With dead ends: 44 [2023-02-18 00:19:14,254 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 00:19:14,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2023-02-18 00:19:14,255 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:14,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 66 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:14,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 00:19:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-18 00:19:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-02-18 00:19:14,258 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2023-02-18 00:19:14,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:14,258 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-02-18 00:19:14,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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 00:19:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-02-18 00:19:14,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 00:19:14,259 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:14,259 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:14,279 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 00:19:14,479 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 00:19:14,479 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:14,480 INFO L85 PathProgramCache]: Analyzing trace with hash -45874964, now seen corresponding path program 8 times [2023-02-18 00:19:14,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:14,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759603598] [2023-02-18 00:19:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:14,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:14,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:14,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759603598] [2023-02-18 00:19:14,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759603598] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:14,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843739734] [2023-02-18 00:19:14,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:14,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:14,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:14,580 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 00:19:14,582 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 00:19:14,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:14,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:14,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 00:19:14,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:14,651 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 00:19:14,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:14,688 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 00:19:14,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843739734] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:14,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:14,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2023-02-18 00:19:14,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366672197] [2023-02-18 00:19:14,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:14,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 00:19:14,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:14,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 00:19:14,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-02-18 00:19:14,690 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 00:19:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:14,739 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-02-18 00:19:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 00:19:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 00:19:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:14,740 INFO L225 Difference]: With dead ends: 36 [2023-02-18 00:19:14,740 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 00:19:14,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 18 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:19:14,741 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:14,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 23 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 00:19:14,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2023-02-18 00:19:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 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 00:19:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-02-18 00:19:14,745 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2023-02-18 00:19:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:14,745 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-02-18 00:19:14,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 00:19:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-02-18 00:19:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 00:19:14,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:14,746 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:14,753 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 00:19:14,951 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 00:19:14,951 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:14,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:14,952 INFO L85 PathProgramCache]: Analyzing trace with hash -856632115, now seen corresponding path program 9 times [2023-02-18 00:19:14,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:14,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454115287] [2023-02-18 00:19:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:14,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:15,079 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 00:19:15,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:15,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454115287] [2023-02-18 00:19:15,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454115287] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:15,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758513549] [2023-02-18 00:19:15,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:15,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:15,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:15,093 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 00:19:15,120 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 00:19:15,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 00:19:15,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:15,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:19:15,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:15,233 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 00:19:15,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:15,300 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 00:19:15,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758513549] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:15,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:15,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-02-18 00:19:15,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373920407] [2023-02-18 00:19:15,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:15,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 00:19:15,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:15,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 00:19:15,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-02-18 00:19:15,303 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 00:19:15,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:15,374 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-02-18 00:19:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 00:19:15,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 00:19:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:15,377 INFO L225 Difference]: With dead ends: 51 [2023-02-18 00:19:15,377 INFO L226 Difference]: Without dead ends: 29 [2023-02-18 00:19:15,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2023-02-18 00:19:15,378 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:15,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-18 00:19:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-18 00:19:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-02-18 00:19:15,387 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2023-02-18 00:19:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:15,388 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-02-18 00:19:15,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 00:19:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-02-18 00:19:15,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 00:19:15,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:15,389 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:15,401 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 00:19:15,594 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 00:19:15,595 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:15,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2001354872, now seen corresponding path program 10 times [2023-02-18 00:19:15,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:15,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279094290] [2023-02-18 00:19:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:15,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:15,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:15,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279094290] [2023-02-18 00:19:15,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279094290] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:15,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349675131] [2023-02-18 00:19:15,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:15,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:15,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:15,713 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 00:19:15,714 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 00:19:15,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:15,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:15,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:19:15,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:15,800 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 00:19:15,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:15,846 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 00:19:15,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349675131] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:15,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:15,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2023-02-18 00:19:15,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324499740] [2023-02-18 00:19:15,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:15,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 00:19:15,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:15,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 00:19:15,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-02-18 00:19:15,847 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 00:19:15,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:15,904 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2023-02-18 00:19:15,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 00:19:15,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 28 [2023-02-18 00:19:15,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:15,906 INFO L225 Difference]: With dead ends: 40 [2023-02-18 00:19:15,906 INFO L226 Difference]: Without dead ends: 38 [2023-02-18 00:19:15,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 22 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2023-02-18 00:19:15,907 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:15,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:15,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-18 00:19:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2023-02-18 00:19:15,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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 00:19:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-02-18 00:19:15,923 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2023-02-18 00:19:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:15,923 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-02-18 00:19:15,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 00:19:15,924 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-02-18 00:19:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 00:19:15,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:15,926 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:15,947 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 00:19:16,131 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 00:19:16,132 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:16,133 INFO L85 PathProgramCache]: Analyzing trace with hash 377831601, now seen corresponding path program 11 times [2023-02-18 00:19:16,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:16,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928235889] [2023-02-18 00:19:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:16,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:16,238 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 00:19:16,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:16,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928235889] [2023-02-18 00:19:16,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928235889] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:16,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73485508] [2023-02-18 00:19:16,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:16,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:16,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:16,254 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 00:19:16,255 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 00:19:16,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-18 00:19:16,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:16,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 00:19:16,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:16,407 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 00:19:16,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:16,488 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 00:19:16,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73485508] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:16,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:16,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-02-18 00:19:16,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527264010] [2023-02-18 00:19:16,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:16,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 00:19:16,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:16,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 00:19:16,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2023-02-18 00:19:16,490 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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 00:19:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:16,580 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2023-02-18 00:19:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 00:19:16,580 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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 31 [2023-02-18 00:19:16,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:16,580 INFO L225 Difference]: With dead ends: 58 [2023-02-18 00:19:16,580 INFO L226 Difference]: Without dead ends: 33 [2023-02-18 00:19:16,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 33 SyntacticMatches, 20 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 00:19:16,581 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:16,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 74 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:16,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-18 00:19:16,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-18 00:19:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-02-18 00:19:16,584 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2023-02-18 00:19:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:16,584 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-02-18 00:19:16,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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 00:19:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-02-18 00:19:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 00:19:16,585 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:16,585 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:16,590 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 00:19:16,790 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 00:19:16,790 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:16,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:16,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1007703532, now seen corresponding path program 12 times [2023-02-18 00:19:16,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:16,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575294946] [2023-02-18 00:19:16,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:16,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:16,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:16,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575294946] [2023-02-18 00:19:16,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575294946] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:16,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993723263] [2023-02-18 00:19:16,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:16,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:16,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:16,902 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 00:19:16,909 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 00:19:16,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 00:19:16,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:16,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:19:16,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:17,020 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 00:19:17,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:17,075 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 00:19:17,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993723263] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:17,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:17,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2023-02-18 00:19:17,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655354040] [2023-02-18 00:19:17,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:17,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 00:19:17,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:17,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 00:19:17,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:19:17,077 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 00:19:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:17,146 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2023-02-18 00:19:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 00:19:17,146 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) Word has length 32 [2023-02-18 00:19:17,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:17,147 INFO L225 Difference]: With dead ends: 44 [2023-02-18 00:19:17,147 INFO L226 Difference]: Without dead ends: 42 [2023-02-18 00:19:17,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 26 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2023-02-18 00:19:17,147 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:17,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 27 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:17,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-18 00:19:17,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2023-02-18 00:19:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 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 00:19:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-02-18 00:19:17,150 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2023-02-18 00:19:17,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:17,150 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-02-18 00:19:17,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 00:19:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-02-18 00:19:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 00:19:17,151 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:17,151 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:17,156 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 00:19:17,356 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 00:19:17,356 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:17,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:17,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1320656947, now seen corresponding path program 13 times [2023-02-18 00:19:17,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:17,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758248376] [2023-02-18 00:19:17,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:17,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:17,543 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 00:19:17,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758248376] [2023-02-18 00:19:17,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758248376] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:17,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001629437] [2023-02-18 00:19:17,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:17,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:17,545 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 00:19:17,547 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 00:19:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:17,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:19:17,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:17,742 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 00:19:17,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:17,866 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 00:19:17,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001629437] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:17,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:17,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-02-18 00:19:17,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930646611] [2023-02-18 00:19:17,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:17,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 00:19:17,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:17,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 00:19:17,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2023-02-18 00:19:17,867 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 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 00:19:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:17,970 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2023-02-18 00:19:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 00:19:17,970 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 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 35 [2023-02-18 00:19:17,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:17,971 INFO L225 Difference]: With dead ends: 65 [2023-02-18 00:19:17,971 INFO L226 Difference]: Without dead ends: 37 [2023-02-18 00:19:17,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 00:19:17,972 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:17,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 72 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-18 00:19:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-18 00:19:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2023-02-18 00:19:17,975 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2023-02-18 00:19:17,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:17,975 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2023-02-18 00:19:17,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 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 00:19:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2023-02-18 00:19:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 00:19:17,976 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:17,976 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:17,983 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 00:19:18,181 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 00:19:18,181 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:18,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:18,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1149263752, now seen corresponding path program 14 times [2023-02-18 00:19:18,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:18,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134013809] [2023-02-18 00:19:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:18,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:18,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:18,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134013809] [2023-02-18 00:19:18,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134013809] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:18,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905054243] [2023-02-18 00:19:18,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:18,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:18,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:18,269 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 00:19:18,271 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 00:19:18,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:18,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:18,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:19:18,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:18,373 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 00:19:18,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:18,439 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 00:19:18,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905054243] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:18,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:18,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2023-02-18 00:19:18,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466742480] [2023-02-18 00:19:18,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:18,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 00:19:18,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:18,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 00:19:18,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-18 00:19:18,440 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 00:19:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:18,515 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2023-02-18 00:19:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 00:19:18,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 36 [2023-02-18 00:19:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:18,516 INFO L225 Difference]: With dead ends: 48 [2023-02-18 00:19:18,516 INFO L226 Difference]: Without dead ends: 46 [2023-02-18 00:19:18,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 30 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2023-02-18 00:19:18,517 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:18,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:18,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-18 00:19:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2023-02-18 00:19:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 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 00:19:18,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-02-18 00:19:18,520 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2023-02-18 00:19:18,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:18,520 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-02-18 00:19:18,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 00:19:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-02-18 00:19:18,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 00:19:18,521 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:18,521 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:18,528 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 00:19:18,727 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 00:19:18,727 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:18,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:18,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1758027599, now seen corresponding path program 15 times [2023-02-18 00:19:18,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:18,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136596365] [2023-02-18 00:19:18,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:18,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:18,901 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 00:19:18,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:18,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136596365] [2023-02-18 00:19:18,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136596365] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:18,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310758968] [2023-02-18 00:19:18,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:18,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:18,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:18,915 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 00:19:18,917 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 00:19:18,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-18 00:19:18,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:19:18,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:19,115 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 00:19:19,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:19,229 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 00:19:19,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310758968] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:19,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:19,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-02-18 00:19:19,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601147985] [2023-02-18 00:19:19,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:19,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 00:19:19,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:19,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 00:19:19,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2023-02-18 00:19:19,230 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 00:19:19,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:19,336 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2023-02-18 00:19:19,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 00:19:19,336 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 39 [2023-02-18 00:19:19,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:19,336 INFO L225 Difference]: With dead ends: 72 [2023-02-18 00:19:19,336 INFO L226 Difference]: Without dead ends: 41 [2023-02-18 00:19:19,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 26 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=1319, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 00:19:19,337 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:19,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 88 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-18 00:19:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-18 00:19:19,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 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 00:19:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-02-18 00:19:19,340 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2023-02-18 00:19:19,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:19,341 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-02-18 00:19:19,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 00:19:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-02-18 00:19:19,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 00:19:19,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:19,341 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:19,348 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 00:19:19,546 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 00:19:19,546 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash -895333652, now seen corresponding path program 16 times [2023-02-18 00:19:19,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:19,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949622371] [2023-02-18 00:19:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:19,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:19,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:19,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949622371] [2023-02-18 00:19:19,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949622371] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:19,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562704442] [2023-02-18 00:19:19,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:19,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:19,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:19,650 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 00:19:19,653 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 00:19:19,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:19,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:19,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:19:19,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:19,798 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 00:19:19,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:19,870 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 00:19:19,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562704442] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:19,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:19,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2023-02-18 00:19:19,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036030769] [2023-02-18 00:19:19,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:19,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 00:19:19,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:19,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 00:19:19,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-02-18 00:19:19,872 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:19,954 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2023-02-18 00:19:19,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 00:19:19,954 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-18 00:19:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:19,955 INFO L225 Difference]: With dead ends: 52 [2023-02-18 00:19:19,955 INFO L226 Difference]: Without dead ends: 50 [2023-02-18 00:19:19,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 52 SyntacticMatches, 34 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2023-02-18 00:19:19,956 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:19,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 26 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-18 00:19:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2023-02-18 00:19:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 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 00:19:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-02-18 00:19:19,959 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2023-02-18 00:19:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:19,960 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-02-18 00:19:19,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:19,960 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-02-18 00:19:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 00:19:19,961 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:19,961 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:19,966 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 00:19:20,166 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 00:19:20,166 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:20,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:20,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1133098291, now seen corresponding path program 17 times [2023-02-18 00:19:20,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:20,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050929451] [2023-02-18 00:19:20,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:20,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:20,348 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 00:19:20,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:20,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050929451] [2023-02-18 00:19:20,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050929451] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:20,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680604028] [2023-02-18 00:19:20,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:20,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:20,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:20,349 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 00:19:20,351 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 00:19:20,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-18 00:19:20,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:20,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:19:20,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:20,570 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 00:19:20,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:20,727 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 00:19:20,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680604028] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:20,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:20,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-02-18 00:19:20,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144379318] [2023-02-18 00:19:20,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:20,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 00:19:20,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:20,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 00:19:20,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 00:19:20,730 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 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 00:19:20,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:20,912 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2023-02-18 00:19:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 00:19:20,912 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 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 43 [2023-02-18 00:19:20,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:20,913 INFO L225 Difference]: With dead ends: 79 [2023-02-18 00:19:20,913 INFO L226 Difference]: Without dead ends: 45 [2023-02-18 00:19:20,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 29 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=481, Invalid=1589, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 00:19:20,915 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 126 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 00:19:20,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 126 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-18 00:19:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-02-18 00:19:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-02-18 00:19:20,923 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2023-02-18 00:19:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:20,923 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-02-18 00:19:20,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 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 00:19:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-02-18 00:19:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 00:19:20,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:20,925 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:20,943 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 00:19:21,130 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 00:19:21,130 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1589878904, now seen corresponding path program 18 times [2023-02-18 00:19:21,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:21,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535481035] [2023-02-18 00:19:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:21,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:21,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:21,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535481035] [2023-02-18 00:19:21,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535481035] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:21,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486021876] [2023-02-18 00:19:21,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:21,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:21,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:21,347 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 00:19:21,388 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 00:19:21,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-18 00:19:21,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:21,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:19:21,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:21,511 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 00:19:21,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:21,597 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 00:19:21,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486021876] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:21,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:21,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2023-02-18 00:19:21,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857844543] [2023-02-18 00:19:21,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:21,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 00:19:21,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:21,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 00:19:21,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-02-18 00:19:21,599 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 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 00:19:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:21,686 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2023-02-18 00:19:21,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 00:19:21,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 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 44 [2023-02-18 00:19:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:21,687 INFO L225 Difference]: With dead ends: 56 [2023-02-18 00:19:21,687 INFO L226 Difference]: Without dead ends: 54 [2023-02-18 00:19:21,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 57 SyntacticMatches, 38 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2023-02-18 00:19:21,688 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:21,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 31 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-18 00:19:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-02-18 00:19:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 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 00:19:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2023-02-18 00:19:21,691 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2023-02-18 00:19:21,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:21,691 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2023-02-18 00:19:21,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 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 00:19:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2023-02-18 00:19:21,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 00:19:21,692 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:21,692 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:21,711 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 00:19:21,899 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 00:19:21,899 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash 821731505, now seen corresponding path program 19 times [2023-02-18 00:19:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:21,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290719478] [2023-02-18 00:19:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:21,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:22,119 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 00:19:22,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:22,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290719478] [2023-02-18 00:19:22,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290719478] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:22,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212752920] [2023-02-18 00:19:22,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:22,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:22,123 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 00:19:22,129 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 00:19:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:22,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 00:19:22,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:22,440 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 00:19:22,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:22,547 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 00:19:22,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212752920] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:22,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:22,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-02-18 00:19:22,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734409918] [2023-02-18 00:19:22,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:22,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-18 00:19:22,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-18 00:19:22,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 00:19:22,549 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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 00:19:22,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:22,672 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2023-02-18 00:19:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 00:19:22,672 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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 47 [2023-02-18 00:19:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:22,672 INFO L225 Difference]: With dead ends: 86 [2023-02-18 00:19:22,672 INFO L226 Difference]: Without dead ends: 49 [2023-02-18 00:19:22,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 49 SyntacticMatches, 32 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=566, Invalid=1884, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 00:19:22,673 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:22,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 126 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-18 00:19:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-02-18 00:19:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-02-18 00:19:22,677 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2023-02-18 00:19:22,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:22,677 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-02-18 00:19:22,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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 00:19:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-02-18 00:19:22,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 00:19:22,678 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:22,678 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:22,695 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 00:19:22,878 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 00:19:22,878 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:22,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:22,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1726078956, now seen corresponding path program 20 times [2023-02-18 00:19:22,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:22,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011671639] [2023-02-18 00:19:22,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:22,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:23,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:23,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011671639] [2023-02-18 00:19:23,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011671639] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:23,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000766726] [2023-02-18 00:19:23,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:23,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:23,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:23,041 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 00:19:23,043 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 00:19:23,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:23,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:23,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:19:23,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:23,217 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 00:19:23,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:23,337 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 00:19:23,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000766726] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:23,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:23,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2023-02-18 00:19:23,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623143486] [2023-02-18 00:19:23,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:23,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 00:19:23,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:23,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 00:19:23,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2023-02-18 00:19:23,338 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:23,442 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2023-02-18 00:19:23,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 00:19:23,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 00:19:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:23,442 INFO L225 Difference]: With dead ends: 60 [2023-02-18 00:19:23,443 INFO L226 Difference]: Without dead ends: 58 [2023-02-18 00:19:23,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 62 SyntacticMatches, 42 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2023-02-18 00:19:23,443 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:23,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 27 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:23,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-18 00:19:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2023-02-18 00:19:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 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 00:19:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2023-02-18 00:19:23,449 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2023-02-18 00:19:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:23,449 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2023-02-18 00:19:23,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2023-02-18 00:19:23,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 00:19:23,449 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:23,449 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:23,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:23,654 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 00:19:23,654 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:23,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2020436531, now seen corresponding path program 21 times [2023-02-18 00:19:23,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:23,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933345217] [2023-02-18 00:19:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:23,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:23,884 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 00:19:23,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:23,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933345217] [2023-02-18 00:19:23,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933345217] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:23,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23114065] [2023-02-18 00:19:23,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:23,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:23,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:23,886 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 00:19:23,888 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 00:19:23,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-18 00:19:23,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:23,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:19:23,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:24,207 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 00:19:24,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:24,383 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 00:19:24,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23114065] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:24,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:24,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-02-18 00:19:24,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959260653] [2023-02-18 00:19:24,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:24,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-18 00:19:24,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-18 00:19:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 00:19:24,385 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 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 00:19:24,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:24,562 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2023-02-18 00:19:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 00:19:24,562 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 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 51 [2023-02-18 00:19:24,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:24,562 INFO L225 Difference]: With dead ends: 93 [2023-02-18 00:19:24,562 INFO L226 Difference]: Without dead ends: 53 [2023-02-18 00:19:24,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 35 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 00:19:24,563 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 152 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 00:19:24,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 152 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-18 00:19:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-18 00:19:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-02-18 00:19:24,567 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2023-02-18 00:19:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:24,568 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-02-18 00:19:24,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 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 00:19:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-02-18 00:19:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 00:19:24,569 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:24,569 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:24,577 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 00:19:24,773 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 00:19:24,774 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:24,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:24,776 INFO L85 PathProgramCache]: Analyzing trace with hash -318652536, now seen corresponding path program 22 times [2023-02-18 00:19:24,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:24,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312603318] [2023-02-18 00:19:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:24,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:24,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:24,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312603318] [2023-02-18 00:19:24,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312603318] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:24,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438647377] [2023-02-18 00:19:24,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:24,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:24,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:24,959 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 00:19:24,960 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 00:19:25,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:25,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:25,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:19:25,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:25,125 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 00:19:25,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:25,254 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 00:19:25,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438647377] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:25,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:25,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2023-02-18 00:19:25,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774283557] [2023-02-18 00:19:25,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:25,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 00:19:25,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:25,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 00:19:25,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:19:25,255 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 00:19:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:25,351 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2023-02-18 00:19:25,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 00:19:25,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 52 [2023-02-18 00:19:25,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:25,352 INFO L225 Difference]: With dead ends: 64 [2023-02-18 00:19:25,352 INFO L226 Difference]: Without dead ends: 62 [2023-02-18 00:19:25,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 67 SyntacticMatches, 46 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2023-02-18 00:19:25,353 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:25,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 26 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:25,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-18 00:19:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2023-02-18 00:19:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 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 00:19:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-02-18 00:19:25,359 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2023-02-18 00:19:25,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:25,359 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-02-18 00:19:25,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 00:19:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-02-18 00:19:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 00:19:25,360 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:25,360 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:25,370 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 00:19:25,565 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 00:19:25,565 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:25,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:25,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1095155535, now seen corresponding path program 23 times [2023-02-18 00:19:25,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:25,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250206473] [2023-02-18 00:19:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:25,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:25,816 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 00:19:25,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250206473] [2023-02-18 00:19:25,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250206473] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:25,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740184250] [2023-02-18 00:19:25,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:25,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:25,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:25,833 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 00:19:25,853 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 00:19:25,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-18 00:19:25,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:25,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:19:25,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:26,101 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 00:19:26,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:26,261 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 00:19:26,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740184250] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:26,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:26,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-02-18 00:19:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455404984] [2023-02-18 00:19:26,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:26,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 00:19:26,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:26,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 00:19:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 00:19:26,266 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 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 00:19:26,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:26,411 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2023-02-18 00:19:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 00:19:26,412 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 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 55 [2023-02-18 00:19:26,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:26,412 INFO L225 Difference]: With dead ends: 100 [2023-02-18 00:19:26,412 INFO L226 Difference]: Without dead ends: 57 [2023-02-18 00:19:26,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 57 SyntacticMatches, 38 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=757, Invalid=2549, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 00:19:26,414 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 117 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 00:19:26,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 117 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:26,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-18 00:19:26,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-18 00:19:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-02-18 00:19:26,431 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2023-02-18 00:19:26,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:26,431 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-02-18 00:19:26,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 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 00:19:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-02-18 00:19:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 00:19:26,432 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:26,433 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:26,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:26,638 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 00:19:26,638 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:26,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:26,638 INFO L85 PathProgramCache]: Analyzing trace with hash 548869356, now seen corresponding path program 24 times [2023-02-18 00:19:26,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:26,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913986347] [2023-02-18 00:19:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:26,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:26,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:26,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913986347] [2023-02-18 00:19:26,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913986347] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:26,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712998592] [2023-02-18 00:19:26,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:26,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:26,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:26,803 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 00:19:26,826 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 00:19:26,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-18 00:19:26,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:26,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:19:26,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:26,993 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 00:19:26,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:27,142 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 00:19:27,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712998592] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:27,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:27,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2023-02-18 00:19:27,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646079329] [2023-02-18 00:19:27,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:27,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 00:19:27,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:27,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 00:19:27,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2023-02-18 00:19:27,145 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 00:19:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:27,267 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2023-02-18 00:19:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 00:19:27,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 56 [2023-02-18 00:19:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:27,268 INFO L225 Difference]: With dead ends: 68 [2023-02-18 00:19:27,268 INFO L226 Difference]: Without dead ends: 66 [2023-02-18 00:19:27,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 72 SyntacticMatches, 50 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 00:19:27,269 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:27,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 26 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-18 00:19:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2023-02-18 00:19:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 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 00:19:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2023-02-18 00:19:27,276 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2023-02-18 00:19:27,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:27,276 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2023-02-18 00:19:27,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 00:19:27,276 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2023-02-18 00:19:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 00:19:27,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:27,277 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:27,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:27,481 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 00:19:27,482 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:27,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:27,483 INFO L85 PathProgramCache]: Analyzing trace with hash 431309005, now seen corresponding path program 25 times [2023-02-18 00:19:27,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:27,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717780786] [2023-02-18 00:19:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:27,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:27,785 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 00:19:27,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:27,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717780786] [2023-02-18 00:19:27,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717780786] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:27,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70955464] [2023-02-18 00:19:27,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:27,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:27,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:27,794 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 00:19:27,831 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 00:19:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:27,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 00:19:27,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:28,079 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 00:19:28,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:28,260 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 00:19:28,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70955464] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:28,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:28,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-02-18 00:19:28,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590734330] [2023-02-18 00:19:28,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:28,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 00:19:28,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:28,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 00:19:28,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 00:19:28,264 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 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 00:19:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:28,488 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2023-02-18 00:19:28,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 00:19:28,488 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 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 59 [2023-02-18 00:19:28,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:28,489 INFO L225 Difference]: With dead ends: 107 [2023-02-18 00:19:28,489 INFO L226 Difference]: Without dead ends: 61 [2023-02-18 00:19:28,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 61 SyntacticMatches, 41 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=863, Invalid=2919, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 00:19:28,490 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:28,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:28,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-18 00:19:28,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-02-18 00:19:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-02-18 00:19:28,495 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2023-02-18 00:19:28,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:28,495 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-02-18 00:19:28,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 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 00:19:28,495 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-02-18 00:19:28,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 00:19:28,495 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:28,495 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:28,500 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 00:19:28,700 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 00:19:28,701 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:28,701 INFO L85 PathProgramCache]: Analyzing trace with hash -471302264, now seen corresponding path program 26 times [2023-02-18 00:19:28,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:28,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944590008] [2023-02-18 00:19:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:28,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:28,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:28,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944590008] [2023-02-18 00:19:28,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944590008] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:28,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342918370] [2023-02-18 00:19:28,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:28,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:28,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:28,889 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 00:19:28,891 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 00:19:28,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:19:28,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:29,117 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 00:19:29,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:29,309 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 00:19:29,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342918370] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:29,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:29,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2023-02-18 00:19:29,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991864989] [2023-02-18 00:19:29,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:29,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 00:19:29,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:29,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 00:19:29,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2023-02-18 00:19:29,311 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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 00:19:29,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:29,407 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2023-02-18 00:19:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 00:19:29,408 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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 60 [2023-02-18 00:19:29,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:29,408 INFO L225 Difference]: With dead ends: 72 [2023-02-18 00:19:29,408 INFO L226 Difference]: Without dead ends: 70 [2023-02-18 00:19:29,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 77 SyntacticMatches, 54 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 00:19:29,409 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 64 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:29,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 30 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-18 00:19:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2023-02-18 00:19:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 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 00:19:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2023-02-18 00:19:29,425 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2023-02-18 00:19:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:29,425 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2023-02-18 00:19:29,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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 00:19:29,426 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2023-02-18 00:19:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 00:19:29,426 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:29,426 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:29,434 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 00:19:29,627 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 00:19:29,627 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:29,627 INFO L85 PathProgramCache]: Analyzing trace with hash -312835919, now seen corresponding path program 27 times [2023-02-18 00:19:29,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:29,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354700642] [2023-02-18 00:19:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:29,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:29,961 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 00:19:29,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:29,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354700642] [2023-02-18 00:19:29,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354700642] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:29,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949650565] [2023-02-18 00:19:29,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:29,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:29,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:29,963 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 00:19:29,965 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 00:19:30,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-18 00:19:30,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:30,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 00:19:30,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:30,335 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 00:19:30,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:30,598 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 00:19:30,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949650565] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:30,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:30,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-02-18 00:19:30,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381435804] [2023-02-18 00:19:30,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:30,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 00:19:30,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 00:19:30,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=1885, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 00:19:30,600 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 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 00:19:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:30,776 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2023-02-18 00:19:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 00:19:30,776 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 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 63 [2023-02-18 00:19:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:30,777 INFO L225 Difference]: With dead ends: 114 [2023-02-18 00:19:30,777 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 00:19:30,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 65 SyntacticMatches, 44 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=976, Invalid=3314, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 00:19:30,779 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:30,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 147 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:30,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 00:19:30,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-02-18 00:19:30,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-02-18 00:19:30,784 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2023-02-18 00:19:30,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:30,784 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-02-18 00:19:30,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 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 00:19:30,784 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-02-18 00:19:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 00:19:30,785 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:30,785 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:30,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:30,989 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 00:19:30,990 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:30,990 INFO L85 PathProgramCache]: Analyzing trace with hash -636884500, now seen corresponding path program 28 times [2023-02-18 00:19:30,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:30,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014664923] [2023-02-18 00:19:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:30,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:31,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:31,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014664923] [2023-02-18 00:19:31,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014664923] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:31,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321901304] [2023-02-18 00:19:31,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:31,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:31,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:31,209 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 00:19:31,240 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 00:19:31,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:31,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:31,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:19:31,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:31,446 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 00:19:31,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:31,637 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 00:19:31,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321901304] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:31,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:31,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2023-02-18 00:19:31,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435745085] [2023-02-18 00:19:31,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:31,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 00:19:31,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:31,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 00:19:31,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2023-02-18 00:19:31,639 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 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 00:19:31,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:31,768 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2023-02-18 00:19:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 00:19:31,769 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 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 64 [2023-02-18 00:19:31,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:31,769 INFO L225 Difference]: With dead ends: 76 [2023-02-18 00:19:31,769 INFO L226 Difference]: Without dead ends: 74 [2023-02-18 00:19:31,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 82 SyntacticMatches, 58 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 00:19:31,770 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:31,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 32 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:31,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-18 00:19:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2023-02-18 00:19:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 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 00:19:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2023-02-18 00:19:31,778 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2023-02-18 00:19:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:31,779 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2023-02-18 00:19:31,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 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 00:19:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2023-02-18 00:19:31,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 00:19:31,780 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:31,780 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:31,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-02-18 00:19:31,982 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 00:19:31,982 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:31,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:31,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1744194509, now seen corresponding path program 29 times [2023-02-18 00:19:31,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:31,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153316306] [2023-02-18 00:19:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:31,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:32,367 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 00:19:32,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:32,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153316306] [2023-02-18 00:19:32,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153316306] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:32,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011437401] [2023-02-18 00:19:32,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:32,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:32,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:32,369 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 00:19:32,371 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 00:19:32,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-02-18 00:19:32,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:32,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 00:19:32,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:32,844 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 00:19:32,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:33,136 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 00:19:33,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011437401] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:33,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:33,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-02-18 00:19:33,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804535946] [2023-02-18 00:19:33,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:33,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-18 00:19:33,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:33,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-18 00:19:33,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=2122, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 00:19:33,138 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 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 00:19:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:33,410 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2023-02-18 00:19:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 00:19:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 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 67 [2023-02-18 00:19:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:33,410 INFO L225 Difference]: With dead ends: 121 [2023-02-18 00:19:33,411 INFO L226 Difference]: Without dead ends: 69 [2023-02-18 00:19:33,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 69 SyntacticMatches, 47 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2181 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1096, Invalid=3734, Unknown=0, NotChecked=0, Total=4830 [2023-02-18 00:19:33,412 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:33,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 192 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-18 00:19:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-02-18 00:19:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2023-02-18 00:19:33,418 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2023-02-18 00:19:33,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:33,418 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2023-02-18 00:19:33,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 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 00:19:33,418 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2023-02-18 00:19:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 00:19:33,418 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:33,418 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:33,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:33,624 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 00:19:33,624 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:33,624 INFO L85 PathProgramCache]: Analyzing trace with hash 805871496, now seen corresponding path program 30 times [2023-02-18 00:19:33,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:33,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396174282] [2023-02-18 00:19:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:33,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:33,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:33,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396174282] [2023-02-18 00:19:33,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396174282] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:33,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981814460] [2023-02-18 00:19:33,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:33,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:33,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:33,843 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 00:19:33,845 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 00:19:33,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-02-18 00:19:33,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:33,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:19:33,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:34,107 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 00:19:34,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:34,313 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 00:19:34,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981814460] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:34,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:34,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2023-02-18 00:19:34,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490943325] [2023-02-18 00:19:34,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:34,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 00:19:34,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:34,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 00:19:34,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2023-02-18 00:19:34,315 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 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 00:19:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:34,833 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2023-02-18 00:19:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 00:19:34,834 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 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 68 [2023-02-18 00:19:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:34,834 INFO L225 Difference]: With dead ends: 80 [2023-02-18 00:19:34,834 INFO L226 Difference]: Without dead ends: 78 [2023-02-18 00:19:34,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 87 SyntacticMatches, 62 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 00:19:34,835 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:34,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:19:34,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-18 00:19:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2023-02-18 00:19:34,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 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 00:19:34,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2023-02-18 00:19:34,857 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2023-02-18 00:19:34,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:34,857 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2023-02-18 00:19:34,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 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 00:19:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2023-02-18 00:19:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 00:19:34,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:34,858 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:34,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-02-18 00:19:35,089 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 00:19:35,089 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:35,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1144627023, now seen corresponding path program 31 times [2023-02-18 00:19:35,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:35,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733602256] [2023-02-18 00:19:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:35,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:35,415 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 00:19:35,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:35,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733602256] [2023-02-18 00:19:35,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733602256] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:35,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169916422] [2023-02-18 00:19:35,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:35,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:35,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:35,422 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 00:19:35,422 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 00:19:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:35,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:19:35,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:35,868 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 00:19:35,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:36,081 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 00:19:36,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169916422] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:36,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:36,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-02-18 00:19:36,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141381974] [2023-02-18 00:19:36,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:36,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-18 00:19:36,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:36,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-18 00:19:36,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=2373, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 00:19:36,085 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 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 00:19:36,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:36,293 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2023-02-18 00:19:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 00:19:36,293 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 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 71 [2023-02-18 00:19:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:36,294 INFO L225 Difference]: With dead ends: 128 [2023-02-18 00:19:36,294 INFO L226 Difference]: Without dead ends: 73 [2023-02-18 00:19:36,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 73 SyntacticMatches, 50 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2446 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1223, Invalid=4179, Unknown=0, NotChecked=0, Total=5402 [2023-02-18 00:19:36,295 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:36,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 185 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:36,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-18 00:19:36,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-02-18 00:19:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2023-02-18 00:19:36,301 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2023-02-18 00:19:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:36,301 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2023-02-18 00:19:36,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 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 00:19:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2023-02-18 00:19:36,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-18 00:19:36,302 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:36,302 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:36,307 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 00:19:36,507 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 00:19:36,507 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash -960340244, now seen corresponding path program 32 times [2023-02-18 00:19:36,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:36,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170302753] [2023-02-18 00:19:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:36,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:36,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170302753] [2023-02-18 00:19:36,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170302753] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068371018] [2023-02-18 00:19:36,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:36,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:36,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:36,800 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 00:19:36,802 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 00:19:36,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:36,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:36,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:19:36,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:37,037 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 00:19:37,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:37,192 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 00:19:37,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068371018] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:37,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:37,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2023-02-18 00:19:37,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083900412] [2023-02-18 00:19:37,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:37,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 00:19:37,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:37,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 00:19:37,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2023-02-18 00:19:37,194 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 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 00:19:37,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:37,345 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2023-02-18 00:19:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 00:19:37,345 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 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 72 [2023-02-18 00:19:37,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:37,346 INFO L225 Difference]: With dead ends: 84 [2023-02-18 00:19:37,346 INFO L226 Difference]: Without dead ends: 82 [2023-02-18 00:19:37,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 92 SyntacticMatches, 66 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=616, Invalid=1106, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 00:19:37,346 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 76 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:37,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 27 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:37,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-18 00:19:37,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2023-02-18 00:19:37,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 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 00:19:37,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2023-02-18 00:19:37,353 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2023-02-18 00:19:37,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:37,353 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2023-02-18 00:19:37,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 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 00:19:37,354 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2023-02-18 00:19:37,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 00:19:37,354 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:37,354 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:37,361 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 00:19:37,559 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 00:19:37,560 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash -714230067, now seen corresponding path program 33 times [2023-02-18 00:19:37,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:37,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170233818] [2023-02-18 00:19:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:37,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:37,939 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 00:19:37,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:37,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170233818] [2023-02-18 00:19:37,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170233818] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:37,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301769649] [2023-02-18 00:19:37,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:37,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:37,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:37,941 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 00:19:37,943 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 00:19:38,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-02-18 00:19:38,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:38,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:19:38,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:38,343 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 00:19:38,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:38,599 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 00:19:38,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301769649] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:38,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:38,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2023-02-18 00:19:38,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307507103] [2023-02-18 00:19:38,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:38,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 00:19:38,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:38,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 00:19:38,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=2638, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 00:19:38,602 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 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 00:19:38,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:38,853 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2023-02-18 00:19:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 00:19:38,853 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 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 75 [2023-02-18 00:19:38,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:38,854 INFO L225 Difference]: With dead ends: 135 [2023-02-18 00:19:38,854 INFO L226 Difference]: Without dead ends: 77 [2023-02-18 00:19:38,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 77 SyntacticMatches, 53 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2726 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1357, Invalid=4649, Unknown=0, NotChecked=0, Total=6006 [2023-02-18 00:19:38,855 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:38,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 206 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-18 00:19:38,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-02-18 00:19:38,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2023-02-18 00:19:38,862 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2023-02-18 00:19:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:38,863 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2023-02-18 00:19:38,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 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 00:19:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2023-02-18 00:19:38,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-18 00:19:38,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:38,863 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:38,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-02-18 00:19:39,064 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 00:19:39,064 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:39,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:39,065 INFO L85 PathProgramCache]: Analyzing trace with hash -377872504, now seen corresponding path program 34 times [2023-02-18 00:19:39,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:39,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184922898] [2023-02-18 00:19:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:39,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:39,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:39,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184922898] [2023-02-18 00:19:39,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184922898] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:39,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330864735] [2023-02-18 00:19:39,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:39,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:39,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:39,333 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 00:19:39,335 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 00:19:39,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:39,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:39,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 00:19:39,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:39,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:39,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330864735] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:39,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:39,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 24 [2023-02-18 00:19:39,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467895634] [2023-02-18 00:19:39,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:39,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 00:19:39,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:39,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 00:19:39,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2023-02-18 00:19:39,781 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 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 00:19:39,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:39,897 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2023-02-18 00:19:39,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-18 00:19:39,897 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 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 76 [2023-02-18 00:19:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:39,898 INFO L225 Difference]: With dead ends: 88 [2023-02-18 00:19:39,898 INFO L226 Difference]: Without dead ends: 86 [2023-02-18 00:19:39,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 97 SyntacticMatches, 70 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=678, Invalid=1214, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 00:19:39,899 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 82 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:39,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 31 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:19:39,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-18 00:19:39,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2023-02-18 00:19:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 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 00:19:39,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2023-02-18 00:19:39,906 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2023-02-18 00:19:39,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:39,906 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2023-02-18 00:19:39,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 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 00:19:39,906 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2023-02-18 00:19:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 00:19:39,907 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:39,907 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:39,914 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 00:19:40,112 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 00:19:40,112 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:40,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:40,113 INFO L85 PathProgramCache]: Analyzing trace with hash -85663567, now seen corresponding path program 35 times [2023-02-18 00:19:40,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:40,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236182877] [2023-02-18 00:19:40,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:40,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 443 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:40,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:40,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236182877] [2023-02-18 00:19:40,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236182877] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:40,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773866492] [2023-02-18 00:19:40,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:40,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:40,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:40,514 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 00:19:40,515 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 00:19:40,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-02-18 00:19:40,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:40,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 00:19:40,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:40,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:41,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773866492] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:41,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:41,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2023-02-18 00:19:41,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407670332] [2023-02-18 00:19:41,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:41,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-18 00:19:41,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:41,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-18 00:19:41,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=2917, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 00:19:41,223 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 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 00:19:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:41,500 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2023-02-18 00:19:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 00:19:41,500 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 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 79 [2023-02-18 00:19:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:41,501 INFO L225 Difference]: With dead ends: 142 [2023-02-18 00:19:41,501 INFO L226 Difference]: Without dead ends: 81 [2023-02-18 00:19:41,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 81 SyntacticMatches, 56 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3021 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2023-02-18 00:19:41,502 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:41,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 235 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-18 00:19:41,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-18 00:19:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 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 00:19:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2023-02-18 00:19:41,509 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2023-02-18 00:19:41,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:41,509 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2023-02-18 00:19:41,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 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 00:19:41,510 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2023-02-18 00:19:41,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-18 00:19:41,510 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:41,510 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:41,515 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 00:19:41,716 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 00:19:41,716 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:41,716 INFO L85 PathProgramCache]: Analyzing trace with hash -322407444, now seen corresponding path program 36 times [2023-02-18 00:19:41,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:41,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24863648] [2023-02-18 00:19:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:41,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:41,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:41,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24863648] [2023-02-18 00:19:41,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24863648] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:41,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117506137] [2023-02-18 00:19:41,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:41,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:41,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:41,979 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 00:19:41,980 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 00:19:42,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-02-18 00:19:42,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:42,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 00:19:42,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:42,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:42,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117506137] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:42,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:42,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 25 [2023-02-18 00:19:42,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313506250] [2023-02-18 00:19:42,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:42,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 00:19:42,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:42,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 00:19:42,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2023-02-18 00:19:42,411 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 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 00:19:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:42,538 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2023-02-18 00:19:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 00:19:42,538 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 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 80 [2023-02-18 00:19:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:42,539 INFO L225 Difference]: With dead ends: 92 [2023-02-18 00:19:42,539 INFO L226 Difference]: Without dead ends: 90 [2023-02-18 00:19:42,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 102 SyntacticMatches, 74 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=743, Invalid=1327, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 00:19:42,542 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 84 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:42,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 23 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:42,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-18 00:19:42,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2023-02-18 00:19:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 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 00:19:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2023-02-18 00:19:42,551 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2023-02-18 00:19:42,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:42,551 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2023-02-18 00:19:42,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 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 00:19:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2023-02-18 00:19:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-02-18 00:19:42,552 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:42,552 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:42,557 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 00:19:42,757 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 00:19:42,758 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:42,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1288470067, now seen corresponding path program 37 times [2023-02-18 00:19:42,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:42,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451148024] [2023-02-18 00:19:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:42,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:43,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:43,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451148024] [2023-02-18 00:19:43,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451148024] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:43,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411010825] [2023-02-18 00:19:43,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:43,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:43,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:43,374 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 00:19:43,374 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 00:19:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:43,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 00:19:43,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:44,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:44,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411010825] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:44,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:44,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2023-02-18 00:19:44,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941264374] [2023-02-18 00:19:44,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:44,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-18 00:19:44,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:44,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-18 00:19:44,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=3210, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 00:19:44,383 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 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 00:19:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:44,699 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2023-02-18 00:19:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-18 00:19:44,699 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 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 83 [2023-02-18 00:19:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:44,700 INFO L225 Difference]: With dead ends: 149 [2023-02-18 00:19:44,700 INFO L226 Difference]: Without dead ends: 85 [2023-02-18 00:19:44,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 85 SyntacticMatches, 59 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3331 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1646, Invalid=5664, Unknown=0, NotChecked=0, Total=7310 [2023-02-18 00:19:44,701 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:44,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 210 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-18 00:19:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-02-18 00:19:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 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 00:19:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-02-18 00:19:44,710 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2023-02-18 00:19:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:44,711 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-02-18 00:19:44,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 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 00:19:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-02-18 00:19:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-18 00:19:44,711 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:44,712 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:44,716 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 00:19:44,916 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 00:19:44,917 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:44,917 INFO L85 PathProgramCache]: Analyzing trace with hash 374669192, now seen corresponding path program 38 times [2023-02-18 00:19:44,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:44,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104725171] [2023-02-18 00:19:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:44,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:45,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:45,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104725171] [2023-02-18 00:19:45,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104725171] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:45,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294979933] [2023-02-18 00:19:45,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:45,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:45,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:45,254 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 00:19:45,287 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 00:19:45,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:45,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:45,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 00:19:45,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:45,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:45,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294979933] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:45,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:45,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2023-02-18 00:19:45,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623585919] [2023-02-18 00:19:45,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:45,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 00:19:45,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:45,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 00:19:45,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2023-02-18 00:19:45,894 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 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 00:19:46,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:46,055 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2023-02-18 00:19:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-18 00:19:46,056 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 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 84 [2023-02-18 00:19:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:46,056 INFO L225 Difference]: With dead ends: 96 [2023-02-18 00:19:46,056 INFO L226 Difference]: Without dead ends: 94 [2023-02-18 00:19:46,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 107 SyntacticMatches, 78 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=811, Invalid=1445, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 00:19:46,058 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:46,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 27 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-18 00:19:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2023-02-18 00:19:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 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 00:19:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2023-02-18 00:19:46,066 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2023-02-18 00:19:46,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:46,066 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2023-02-18 00:19:46,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 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 00:19:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2023-02-18 00:19:46,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 00:19:46,067 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:46,067 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:46,073 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 00:19:46,272 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 00:19:46,273 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:46,273 INFO L85 PathProgramCache]: Analyzing trace with hash -845283151, now seen corresponding path program 39 times [2023-02-18 00:19:46,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:46,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037703344] [2023-02-18 00:19:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:46,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:46,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:46,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037703344] [2023-02-18 00:19:46,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037703344] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:46,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000756250] [2023-02-18 00:19:46,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:46,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:46,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:46,944 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 00:19:46,945 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 00:19:47,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2023-02-18 00:19:47,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:47,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 00:19:47,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:47,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:48,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000756250] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:48,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:48,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2023-02-18 00:19:48,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746025801] [2023-02-18 00:19:48,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:48,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-18 00:19:48,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:48,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-18 00:19:48,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=3517, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 00:19:48,021 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 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 00:19:48,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:48,483 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2023-02-18 00:19:48,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 00:19:48,483 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 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 87 [2023-02-18 00:19:48,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:48,484 INFO L225 Difference]: With dead ends: 156 [2023-02-18 00:19:48,484 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 00:19:48,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 89 SyntacticMatches, 62 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3656 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1801, Invalid=6209, Unknown=0, NotChecked=0, Total=8010 [2023-02-18 00:19:48,485 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:48,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 243 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 00:19:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-18 00:19:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2023-02-18 00:19:48,497 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2023-02-18 00:19:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:48,497 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2023-02-18 00:19:48,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 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 00:19:48,498 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2023-02-18 00:19:48,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-02-18 00:19:48,498 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:48,498 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:48,505 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 00:19:48,704 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 00:19:48,704 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1543231252, now seen corresponding path program 40 times [2023-02-18 00:19:48,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:48,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794181737] [2023-02-18 00:19:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:48,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 210 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:49,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:49,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794181737] [2023-02-18 00:19:49,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794181737] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:49,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873265040] [2023-02-18 00:19:49,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:19:49,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:49,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:49,046 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 00:19:49,049 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 00:19:49,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:19:49,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:49,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 00:19:49,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:49,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:49,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873265040] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:49,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:49,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2023-02-18 00:19:49,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150700389] [2023-02-18 00:19:49,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:49,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 00:19:49,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:49,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 00:19:49,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2023-02-18 00:19:49,571 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 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 00:19:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:49,716 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2023-02-18 00:19:49,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-18 00:19:49,717 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 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 88 [2023-02-18 00:19:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:49,718 INFO L225 Difference]: With dead ends: 100 [2023-02-18 00:19:49,718 INFO L226 Difference]: Without dead ends: 98 [2023-02-18 00:19:49,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 112 SyntacticMatches, 82 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=882, Invalid=1568, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 00:19:49,718 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:49,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 32 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:49,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-18 00:19:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2023-02-18 00:19:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 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 00:19:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2023-02-18 00:19:49,728 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2023-02-18 00:19:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:49,728 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2023-02-18 00:19:49,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 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 00:19:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2023-02-18 00:19:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-18 00:19:49,729 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:49,729 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:49,734 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 00:19:49,933 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 00:19:49,934 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:49,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:49,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1067471667, now seen corresponding path program 41 times [2023-02-18 00:19:49,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:49,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920754250] [2023-02-18 00:19:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:49,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:50,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:50,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920754250] [2023-02-18 00:19:50,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920754250] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:50,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179054059] [2023-02-18 00:19:50,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:19:50,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:50,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:50,416 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 00:19:50,418 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 00:19:50,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-02-18 00:19:50,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:50,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 00:19:50,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:51,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:51,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179054059] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:51,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:51,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2023-02-18 00:19:51,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426933953] [2023-02-18 00:19:51,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:51,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-18 00:19:51,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:51,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-18 00:19:51,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=3838, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 00:19:51,878 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:52,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:52,277 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2023-02-18 00:19:52,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-18 00:19:52,277 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-02-18 00:19:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:52,278 INFO L225 Difference]: With dead ends: 163 [2023-02-18 00:19:52,278 INFO L226 Difference]: Without dead ends: 93 [2023-02-18 00:19:52,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 93 SyntacticMatches, 65 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3996 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1963, Invalid=6779, Unknown=0, NotChecked=0, Total=8742 [2023-02-18 00:19:52,284 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 230 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 00:19:52,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 230 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:52,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-18 00:19:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-02-18 00:19:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:52,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2023-02-18 00:19:52,322 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2023-02-18 00:19:52,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:52,323 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2023-02-18 00:19:52,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:52,324 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2023-02-18 00:19:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-18 00:19:52,324 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:52,324 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:52,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:52,529 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 00:19:52,530 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:52,530 INFO L85 PathProgramCache]: Analyzing trace with hash 716259208, now seen corresponding path program 42 times [2023-02-18 00:19:52,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:52,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608627527] [2023-02-18 00:19:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:52,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:52,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608627527] [2023-02-18 00:19:52,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608627527] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390713398] [2023-02-18 00:19:52,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:19:52,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:52,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:52,994 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 00:19:52,996 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 00:19:53,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-02-18 00:19:53,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:53,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-18 00:19:53,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:53,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:53,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390713398] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:53,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:53,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 28 [2023-02-18 00:19:53,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770172194] [2023-02-18 00:19:53,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:53,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 00:19:53,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:53,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 00:19:53,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2023-02-18 00:19:53,643 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 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 00:19:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:53,854 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2023-02-18 00:19:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-18 00:19:53,854 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 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 92 [2023-02-18 00:19:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:53,855 INFO L225 Difference]: With dead ends: 104 [2023-02-18 00:19:53,855 INFO L226 Difference]: Without dead ends: 102 [2023-02-18 00:19:53,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 117 SyntacticMatches, 86 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=956, Invalid=1696, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 00:19:53,856 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 96 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:53,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 32 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-18 00:19:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2023-02-18 00:19:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 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 00:19:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2023-02-18 00:19:53,869 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2023-02-18 00:19:53,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:53,870 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2023-02-18 00:19:53,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 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 00:19:53,870 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2023-02-18 00:19:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-18 00:19:53,872 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:53,872 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:53,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:54,080 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 00:19:54,080 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:54,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:54,081 INFO L85 PathProgramCache]: Analyzing trace with hash 685359281, now seen corresponding path program 43 times [2023-02-18 00:19:54,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:54,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939212254] [2023-02-18 00:19:54,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:54,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:54,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:54,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939212254] [2023-02-18 00:19:54,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939212254] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:54,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685150890] [2023-02-18 00:19:54,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:19:54,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:54,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:54,676 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 00:19:54,681 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 00:19:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:54,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 00:19:54,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:55,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:55,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685150890] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:55,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:55,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2023-02-18 00:19:55,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303747919] [2023-02-18 00:19:55,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:55,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-18 00:19:55,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-18 00:19:55,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=4173, Unknown=0, NotChecked=0, Total=5402 [2023-02-18 00:19:55,969 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:56,464 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2023-02-18 00:19:56,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-18 00:19:56,464 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2023-02-18 00:19:56,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:56,465 INFO L225 Difference]: With dead ends: 170 [2023-02-18 00:19:56,465 INFO L226 Difference]: Without dead ends: 97 [2023-02-18 00:19:56,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 97 SyntacticMatches, 68 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4351 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2132, Invalid=7374, Unknown=0, NotChecked=0, Total=9506 [2023-02-18 00:19:56,465 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:56,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 305 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:19:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-18 00:19:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-02-18 00:19:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-02-18 00:19:56,491 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2023-02-18 00:19:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:56,491 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-02-18 00:19:56,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:19:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-02-18 00:19:56,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-18 00:19:56,491 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:56,492 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:56,498 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 00:19:56,696 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 00:19:56,697 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash 375225836, now seen corresponding path program 44 times [2023-02-18 00:19:56,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:56,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869133297] [2023-02-18 00:19:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:56,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:57,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:57,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869133297] [2023-02-18 00:19:57,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869133297] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:57,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639789641] [2023-02-18 00:19:57,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:19:57,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:57,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:57,079 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 00:19:57,080 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 00:19:57,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:19:57,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:57,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 00:19:57,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:57,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:19:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:57,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639789641] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:19:57,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:19:57,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 29 [2023-02-18 00:19:57,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187926337] [2023-02-18 00:19:57,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:19:57,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 00:19:57,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:19:57,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 00:19:57,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2023-02-18 00:19:57,685 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 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 00:19:57,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:19:57,879 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2023-02-18 00:19:57,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-18 00:19:57,880 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 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 96 [2023-02-18 00:19:57,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:19:57,880 INFO L225 Difference]: With dead ends: 108 [2023-02-18 00:19:57,880 INFO L226 Difference]: Without dead ends: 106 [2023-02-18 00:19:57,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 122 SyntacticMatches, 90 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1033, Invalid=1829, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 00:19:57,892 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 100 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:19:57,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 30 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:19:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-18 00:19:57,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2023-02-18 00:19:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 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 00:19:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2023-02-18 00:19:57,903 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2023-02-18 00:19:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:19:57,903 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2023-02-18 00:19:57,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 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 00:19:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2023-02-18 00:19:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-18 00:19:57,904 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:19:57,904 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2023-02-18 00:19:57,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-02-18 00:19:58,109 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 00:19:58,110 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:19:58,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:19:58,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1442170931, now seen corresponding path program 45 times [2023-02-18 00:19:58,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:19:58,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724176954] [2023-02-18 00:19:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:19:58,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:19:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:19:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 738 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:58,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:19:58,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724176954] [2023-02-18 00:19:58,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724176954] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:19:58,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634209601] [2023-02-18 00:19:58,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:19:58,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:19:58,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:19:58,816 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 00:19:58,818 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 00:19:58,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-02-18 00:19:58,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:19:58,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-18 00:19:58,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:19:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:19:59,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:00,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634209601] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:00,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:00,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2023-02-18 00:20:00,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455068791] [2023-02-18 00:20:00,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:00,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-02-18 00:20:00,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:00,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-02-18 00:20:00,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=4522, Unknown=0, NotChecked=0, Total=5852 [2023-02-18 00:20:00,441 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:00,894 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2023-02-18 00:20:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-18 00:20:00,894 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-02-18 00:20:00,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:00,894 INFO L225 Difference]: With dead ends: 177 [2023-02-18 00:20:00,895 INFO L226 Difference]: Without dead ends: 101 [2023-02-18 00:20:00,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 101 SyntacticMatches, 71 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4721 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2308, Invalid=7994, Unknown=0, NotChecked=0, Total=10302 [2023-02-18 00:20:00,897 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:00,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 335 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:20:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-18 00:20:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-02-18 00:20:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2023-02-18 00:20:00,908 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2023-02-18 00:20:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:00,908 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2023-02-18 00:20:00,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2023-02-18 00:20:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-18 00:20:00,909 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:00,909 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:00,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-02-18 00:20:01,117 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 00:20:01,117 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:01,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:01,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2002329720, now seen corresponding path program 46 times [2023-02-18 00:20:01,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:01,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834979777] [2023-02-18 00:20:01,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:01,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 276 proven. 829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:01,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:01,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834979777] [2023-02-18 00:20:01,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834979777] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:01,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062697191] [2023-02-18 00:20:01,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:20:01,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:01,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:01,539 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 00:20:01,541 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 00:20:01,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:20:01,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:01,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-18 00:20:01,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:01,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:02,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062697191] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:02,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:02,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 30 [2023-02-18 00:20:02,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510297421] [2023-02-18 00:20:02,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:02,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 00:20:02,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:02,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 00:20:02,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2023-02-18 00:20:02,307 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 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 00:20:02,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:02,559 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2023-02-18 00:20:02,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-18 00:20:02,559 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 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 100 [2023-02-18 00:20:02,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:02,560 INFO L225 Difference]: With dead ends: 112 [2023-02-18 00:20:02,560 INFO L226 Difference]: Without dead ends: 110 [2023-02-18 00:20:02,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 127 SyntacticMatches, 94 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1113, Invalid=1967, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 00:20:02,561 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:02,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 25 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:02,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-18 00:20:02,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2023-02-18 00:20:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 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 00:20:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2023-02-18 00:20:02,589 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2023-02-18 00:20:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:02,590 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2023-02-18 00:20:02,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 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 00:20:02,590 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2023-02-18 00:20:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-18 00:20:02,590 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:02,590 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:02,609 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 00:20:02,795 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 00:20:02,796 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:02,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:02,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1400905905, now seen corresponding path program 47 times [2023-02-18 00:20:02,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:02,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948258508] [2023-02-18 00:20:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:02,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:03,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948258508] [2023-02-18 00:20:03,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948258508] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242908480] [2023-02-18 00:20:03,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:20:03,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:03,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:03,642 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 00:20:03,643 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 00:20:03,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-02-18 00:20:03,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:03,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 00:20:03,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:04,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:05,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242908480] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:05,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:05,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2023-02-18 00:20:05,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144258887] [2023-02-18 00:20:05,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:05,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-02-18 00:20:05,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:05,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-02-18 00:20:05,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=4885, Unknown=0, NotChecked=0, Total=6320 [2023-02-18 00:20:05,298 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:06,043 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2023-02-18 00:20:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-18 00:20:06,044 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-02-18 00:20:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:06,044 INFO L225 Difference]: With dead ends: 184 [2023-02-18 00:20:06,044 INFO L226 Difference]: Without dead ends: 105 [2023-02-18 00:20:06,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 105 SyntacticMatches, 74 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5106 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2491, Invalid=8639, Unknown=0, NotChecked=0, Total=11130 [2023-02-18 00:20:06,046 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:06,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 314 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:20:06,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-18 00:20:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-02-18 00:20:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-02-18 00:20:06,058 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2023-02-18 00:20:06,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:06,058 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-02-18 00:20:06,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-02-18 00:20:06,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-18 00:20:06,059 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:06,059 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:06,080 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 00:20:06,264 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 00:20:06,264 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:06,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:06,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1078168852, now seen corresponding path program 48 times [2023-02-18 00:20:06,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:06,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266341844] [2023-02-18 00:20:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:06,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:06,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266341844] [2023-02-18 00:20:06,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266341844] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614208071] [2023-02-18 00:20:06,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:20:06,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:06,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:06,788 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 00:20:06,789 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 00:20:06,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2023-02-18 00:20:06,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:06,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-18 00:20:06,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:07,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:07,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614208071] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:07,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:07,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 31 [2023-02-18 00:20:07,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330937189] [2023-02-18 00:20:07,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:07,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 00:20:07,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:07,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 00:20:07,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2023-02-18 00:20:07,678 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 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 00:20:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:07,889 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2023-02-18 00:20:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-18 00:20:07,890 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 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 104 [2023-02-18 00:20:07,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:07,902 INFO L225 Difference]: With dead ends: 116 [2023-02-18 00:20:07,902 INFO L226 Difference]: Without dead ends: 114 [2023-02-18 00:20:07,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 132 SyntacticMatches, 98 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2191 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1196, Invalid=2110, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 00:20:07,906 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:07,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 35 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-18 00:20:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2023-02-18 00:20:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 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 00:20:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2023-02-18 00:20:07,918 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2023-02-18 00:20:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:07,918 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2023-02-18 00:20:07,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 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 00:20:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2023-02-18 00:20:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-18 00:20:07,919 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:07,919 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:07,924 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 00:20:08,124 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 00:20:08,125 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:08,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:08,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1958010163, now seen corresponding path program 49 times [2023-02-18 00:20:08,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:08,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235827173] [2023-02-18 00:20:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:08,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:08,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:08,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235827173] [2023-02-18 00:20:08,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235827173] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:08,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163448235] [2023-02-18 00:20:08,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:20:08,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:08,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:08,820 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 00:20:08,821 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 00:20:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:08,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-18 00:20:08,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:09,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:10,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163448235] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:10,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:10,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 83 [2023-02-18 00:20:10,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291989716] [2023-02-18 00:20:10,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:10,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-02-18 00:20:10,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:10,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-02-18 00:20:10,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=5262, Unknown=0, NotChecked=0, Total=6806 [2023-02-18 00:20:10,311 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:10,853 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2023-02-18 00:20:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-18 00:20:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2023-02-18 00:20:10,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:10,854 INFO L225 Difference]: With dead ends: 191 [2023-02-18 00:20:10,854 INFO L226 Difference]: Without dead ends: 109 [2023-02-18 00:20:10,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 109 SyntacticMatches, 77 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5506 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2681, Invalid=9309, Unknown=0, NotChecked=0, Total=11990 [2023-02-18 00:20:10,855 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:10,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 271 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-18 00:20:10,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-02-18 00:20:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2023-02-18 00:20:10,867 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2023-02-18 00:20:10,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:10,867 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2023-02-18 00:20:10,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:10,868 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2023-02-18 00:20:10,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-18 00:20:10,868 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:10,868 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:10,876 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 00:20:11,074 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 00:20:11,074 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:11,075 INFO L85 PathProgramCache]: Analyzing trace with hash 5103496, now seen corresponding path program 50 times [2023-02-18 00:20:11,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:11,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063767025] [2023-02-18 00:20:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:11,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:11,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:11,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063767025] [2023-02-18 00:20:11,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063767025] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:11,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078741673] [2023-02-18 00:20:11,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:20:11,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:11,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:11,554 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 00:20:11,555 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 00:20:11,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:20:11,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:11,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 00:20:11,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:11,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:12,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078741673] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:12,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:12,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 32 [2023-02-18 00:20:12,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445638567] [2023-02-18 00:20:12,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:12,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 00:20:12,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 00:20:12,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2023-02-18 00:20:12,234 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 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 00:20:12,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:12,440 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2023-02-18 00:20:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 00:20:12,440 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 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 108 [2023-02-18 00:20:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:12,441 INFO L225 Difference]: With dead ends: 120 [2023-02-18 00:20:12,441 INFO L226 Difference]: Without dead ends: 118 [2023-02-18 00:20:12,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 137 SyntacticMatches, 102 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2357 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1282, Invalid=2258, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 00:20:12,443 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:12,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 34 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-18 00:20:12,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2023-02-18 00:20:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 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 00:20:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2023-02-18 00:20:12,464 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2023-02-18 00:20:12,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:12,465 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2023-02-18 00:20:12,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 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 00:20:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2023-02-18 00:20:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-18 00:20:12,465 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:12,465 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:12,470 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 00:20:12,669 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 00:20:12,669 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:12,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1719214257, now seen corresponding path program 51 times [2023-02-18 00:20:12,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:12,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860337458] [2023-02-18 00:20:12,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:12,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:13,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:13,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860337458] [2023-02-18 00:20:13,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860337458] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:13,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998575298] [2023-02-18 00:20:13,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:20:13,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:13,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:13,419 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 00:20:13,421 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 00:20:13,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2023-02-18 00:20:13,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:13,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-18 00:20:13,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:14,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:14,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998575298] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:14,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:14,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 86 [2023-02-18 00:20:14,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928646265] [2023-02-18 00:20:14,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:14,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-02-18 00:20:14,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:14,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-02-18 00:20:14,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=5653, Unknown=0, NotChecked=0, Total=7310 [2023-02-18 00:20:14,873 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:15,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:15,347 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2023-02-18 00:20:15,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-18 00:20:15,347 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-02-18 00:20:15,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:15,347 INFO L225 Difference]: With dead ends: 198 [2023-02-18 00:20:15,348 INFO L226 Difference]: Without dead ends: 113 [2023-02-18 00:20:15,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 113 SyntacticMatches, 80 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5921 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2878, Invalid=10004, Unknown=0, NotChecked=0, Total=12882 [2023-02-18 00:20:15,348 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:15,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 381 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:15,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-18 00:20:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-02-18 00:20:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:15,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2023-02-18 00:20:15,363 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2023-02-18 00:20:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:15,364 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2023-02-18 00:20:15,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2023-02-18 00:20:15,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-18 00:20:15,365 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:15,365 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:15,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-02-18 00:20:15,569 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 00:20:15,570 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:15,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:15,570 INFO L85 PathProgramCache]: Analyzing trace with hash -301398036, now seen corresponding path program 52 times [2023-02-18 00:20:15,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:15,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489434613] [2023-02-18 00:20:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:15,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 351 proven. 1054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:16,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:16,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489434613] [2023-02-18 00:20:16,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489434613] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:16,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789378384] [2023-02-18 00:20:16,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:20:16,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:16,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:16,029 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 00:20:16,030 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 00:20:16,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:20:16,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:16,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-18 00:20:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:16,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:16,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789378384] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:16,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:16,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 33 [2023-02-18 00:20:16,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604851837] [2023-02-18 00:20:16,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:16,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 00:20:16,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 00:20:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 00:20:16,749 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 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 00:20:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:16,967 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2023-02-18 00:20:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-18 00:20:16,967 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 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 112 [2023-02-18 00:20:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:16,968 INFO L225 Difference]: With dead ends: 124 [2023-02-18 00:20:16,969 INFO L226 Difference]: Without dead ends: 122 [2023-02-18 00:20:16,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 142 SyntacticMatches, 106 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2529 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1371, Invalid=2411, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 00:20:16,969 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 64 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:16,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 34 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-18 00:20:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2023-02-18 00:20:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 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 00:20:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2023-02-18 00:20:16,993 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2023-02-18 00:20:16,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:16,993 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2023-02-18 00:20:16,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 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 00:20:16,993 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2023-02-18 00:20:16,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-18 00:20:16,994 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:16,994 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:17,000 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 00:20:17,198 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 00:20:17,198 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:17,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1832545741, now seen corresponding path program 53 times [2023-02-18 00:20:17,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:17,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125803007] [2023-02-18 00:20:17,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:17,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:18,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:18,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125803007] [2023-02-18 00:20:18,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125803007] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:18,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505753110] [2023-02-18 00:20:18,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:20:18,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:18,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:18,306 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 00:20:18,308 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 00:20:18,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2023-02-18 00:20:18,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:18,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 00:20:18,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:19,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:20,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505753110] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:20,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:20,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 89 [2023-02-18 00:20:20,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150391381] [2023-02-18 00:20:20,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:20,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-02-18 00:20:20,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:20,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-02-18 00:20:20,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=6058, Unknown=0, NotChecked=0, Total=7832 [2023-02-18 00:20:20,292 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:20,789 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2023-02-18 00:20:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 00:20:20,789 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-02-18 00:20:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:20,790 INFO L225 Difference]: With dead ends: 205 [2023-02-18 00:20:20,790 INFO L226 Difference]: Without dead ends: 117 [2023-02-18 00:20:20,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 117 SyntacticMatches, 83 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6351 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3082, Invalid=10724, Unknown=0, NotChecked=0, Total=13806 [2023-02-18 00:20:20,791 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:20,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 346 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-18 00:20:20,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-02-18 00:20:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2023-02-18 00:20:20,806 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2023-02-18 00:20:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:20,806 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2023-02-18 00:20:20,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:20,806 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2023-02-18 00:20:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-18 00:20:20,807 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:20,807 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:20,814 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 00:20:21,012 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 00:20:21,012 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:21,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:21,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1337868168, now seen corresponding path program 54 times [2023-02-18 00:20:21,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:21,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024745868] [2023-02-18 00:20:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:21,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:21,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:21,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024745868] [2023-02-18 00:20:21,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024745868] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:21,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695641612] [2023-02-18 00:20:21,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:20:21,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:21,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:21,586 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 00:20:21,587 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 00:20:21,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2023-02-18 00:20:21,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:21,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 00:20:21,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:22,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:22,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695641612] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:22,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:22,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 34 [2023-02-18 00:20:22,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874619290] [2023-02-18 00:20:22,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:22,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 00:20:22,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:22,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 00:20:22,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 00:20:22,409 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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 00:20:22,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:22,635 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2023-02-18 00:20:22,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-18 00:20:22,636 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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 116 [2023-02-18 00:20:22,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:22,636 INFO L225 Difference]: With dead ends: 128 [2023-02-18 00:20:22,636 INFO L226 Difference]: Without dead ends: 126 [2023-02-18 00:20:22,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 147 SyntacticMatches, 110 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2707 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1463, Invalid=2569, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 00:20:22,637 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 122 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:22,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 31 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:22,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-18 00:20:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2023-02-18 00:20:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 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 00:20:22,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2023-02-18 00:20:22,658 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2023-02-18 00:20:22,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:22,658 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2023-02-18 00:20:22,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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 00:20:22,658 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2023-02-18 00:20:22,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-02-18 00:20:22,659 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:22,659 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:22,665 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 00:20:22,864 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 00:20:22,865 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:22,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:22,865 INFO L85 PathProgramCache]: Analyzing trace with hash -861093711, now seen corresponding path program 55 times [2023-02-18 00:20:22,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:22,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203318407] [2023-02-18 00:20:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:22,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:23,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:23,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203318407] [2023-02-18 00:20:23,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203318407] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:23,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544771598] [2023-02-18 00:20:23,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:20:23,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:23,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:23,801 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 00:20:23,802 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 00:20:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:23,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-18 00:20:23,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:24,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:25,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544771598] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:25,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:25,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 92 [2023-02-18 00:20:25,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693043266] [2023-02-18 00:20:25,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:25,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-02-18 00:20:25,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:25,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-02-18 00:20:25,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=6477, Unknown=0, NotChecked=0, Total=8372 [2023-02-18 00:20:25,825 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:26,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:26,476 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2023-02-18 00:20:26,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-18 00:20:26,476 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2023-02-18 00:20:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:26,477 INFO L225 Difference]: With dead ends: 212 [2023-02-18 00:20:26,477 INFO L226 Difference]: Without dead ends: 121 [2023-02-18 00:20:26,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 121 SyntacticMatches, 86 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6796 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3293, Invalid=11469, Unknown=0, NotChecked=0, Total=14762 [2023-02-18 00:20:26,479 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:26,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 397 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:20:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-18 00:20:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-02-18 00:20:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2023-02-18 00:20:26,518 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2023-02-18 00:20:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:26,519 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2023-02-18 00:20:26,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2023-02-18 00:20:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-18 00:20:26,519 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:26,520 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:26,527 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 00:20:26,725 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 00:20:26,725 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:26,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:26,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1093352684, now seen corresponding path program 56 times [2023-02-18 00:20:26,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:26,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328847814] [2023-02-18 00:20:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:26,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:27,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:27,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328847814] [2023-02-18 00:20:27,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328847814] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:27,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446064678] [2023-02-18 00:20:27,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:20:27,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:27,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:27,371 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 00:20:27,372 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 00:20:27,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:20:27,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:27,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-18 00:20:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:27,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:28,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446064678] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:28,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:28,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 35 [2023-02-18 00:20:28,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579343370] [2023-02-18 00:20:28,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:28,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 00:20:28,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:28,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 00:20:28,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 00:20:28,222 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 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 00:20:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:28,443 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2023-02-18 00:20:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-18 00:20:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 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 120 [2023-02-18 00:20:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:28,444 INFO L225 Difference]: With dead ends: 132 [2023-02-18 00:20:28,444 INFO L226 Difference]: Without dead ends: 130 [2023-02-18 00:20:28,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 152 SyntacticMatches, 114 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1558, Invalid=2732, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 00:20:28,446 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:28,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 33 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-18 00:20:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2023-02-18 00:20:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 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 00:20:28,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2023-02-18 00:20:28,461 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2023-02-18 00:20:28,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:28,461 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2023-02-18 00:20:28,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 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 00:20:28,462 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2023-02-18 00:20:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-18 00:20:28,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:28,462 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:28,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:28,667 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 00:20:28,668 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:28,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:28,668 INFO L85 PathProgramCache]: Analyzing trace with hash -957343539, now seen corresponding path program 57 times [2023-02-18 00:20:28,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:28,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044183494] [2023-02-18 00:20:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:28,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:29,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:29,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044183494] [2023-02-18 00:20:29,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044183494] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:29,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042151027] [2023-02-18 00:20:29,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:20:29,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:29,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:29,862 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 00:20:29,864 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 00:20:29,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2023-02-18 00:20:29,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:29,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 00:20:29,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:30,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:31,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042151027] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:31,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:31,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 95 [2023-02-18 00:20:31,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051009730] [2023-02-18 00:20:31,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:31,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-02-18 00:20:31,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-02-18 00:20:31,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=6910, Unknown=0, NotChecked=0, Total=8930 [2023-02-18 00:20:31,567 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:32,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:32,174 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2023-02-18 00:20:32,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-18 00:20:32,174 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-02-18 00:20:32,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:32,175 INFO L225 Difference]: With dead ends: 219 [2023-02-18 00:20:32,175 INFO L226 Difference]: Without dead ends: 125 [2023-02-18 00:20:32,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 125 SyntacticMatches, 89 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7256 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3511, Invalid=12239, Unknown=0, NotChecked=0, Total=15750 [2023-02-18 00:20:32,176 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:32,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 418 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:20:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-18 00:20:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-02-18 00:20:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2023-02-18 00:20:32,192 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2023-02-18 00:20:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:32,192 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2023-02-18 00:20:32,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2023-02-18 00:20:32,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-18 00:20:32,192 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:32,193 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:32,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:32,397 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 00:20:32,397 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:32,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1559232632, now seen corresponding path program 58 times [2023-02-18 00:20:32,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:32,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910718065] [2023-02-18 00:20:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:32,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 435 proven. 1306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:32,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:32,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910718065] [2023-02-18 00:20:32,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910718065] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:32,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903084215] [2023-02-18 00:20:32,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:20:32,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:32,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:32,959 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 00:20:32,960 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 00:20:33,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:20:33,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-18 00:20:33,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:33,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:34,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903084215] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:34,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:34,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 36 [2023-02-18 00:20:34,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537626007] [2023-02-18 00:20:34,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:34,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-18 00:20:34,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:34,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-18 00:20:34,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 00:20:34,165 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 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 00:20:34,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:34,542 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2023-02-18 00:20:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-18 00:20:34,542 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 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 124 [2023-02-18 00:20:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:34,543 INFO L225 Difference]: With dead ends: 136 [2023-02-18 00:20:34,543 INFO L226 Difference]: Without dead ends: 134 [2023-02-18 00:20:34,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 157 SyntacticMatches, 118 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1656, Invalid=2900, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 00:20:34,543 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:34,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 28 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:34,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-18 00:20:34,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2023-02-18 00:20:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 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 00:20:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2023-02-18 00:20:34,560 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2023-02-18 00:20:34,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:34,561 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2023-02-18 00:20:34,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 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 00:20:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2023-02-18 00:20:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-02-18 00:20:34,561 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:34,561 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:34,567 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 00:20:34,766 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 00:20:34,766 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:34,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:34,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1023213391, now seen corresponding path program 59 times [2023-02-18 00:20:34,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:34,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086262760] [2023-02-18 00:20:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:34,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1277 proven. 553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:35,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:35,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086262760] [2023-02-18 00:20:35,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086262760] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:35,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194640805] [2023-02-18 00:20:35,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:20:35,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:35,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:35,879 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 00:20:35,879 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 00:20:35,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-02-18 00:20:35,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:35,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-18 00:20:35,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:37,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:38,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194640805] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:38,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:38,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 98 [2023-02-18 00:20:38,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114094884] [2023-02-18 00:20:38,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:38,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-02-18 00:20:38,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:38,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-02-18 00:20:38,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=7357, Unknown=0, NotChecked=0, Total=9506 [2023-02-18 00:20:38,095 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:38,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:38,703 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2023-02-18 00:20:38,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-18 00:20:38,704 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2023-02-18 00:20:38,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:38,704 INFO L225 Difference]: With dead ends: 226 [2023-02-18 00:20:38,704 INFO L226 Difference]: Without dead ends: 129 [2023-02-18 00:20:38,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 129 SyntacticMatches, 92 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7731 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3736, Invalid=13034, Unknown=0, NotChecked=0, Total=16770 [2023-02-18 00:20:38,706 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 352 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 00:20:38,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 352 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:20:38,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-18 00:20:38,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-02-18 00:20:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-02-18 00:20:38,722 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2023-02-18 00:20:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:38,723 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-02-18 00:20:38,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:38,723 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-02-18 00:20:38,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-02-18 00:20:38,723 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:38,723 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:38,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:38,928 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 00:20:38,929 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:38,929 INFO L85 PathProgramCache]: Analyzing trace with hash 722145772, now seen corresponding path program 60 times [2023-02-18 00:20:38,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:38,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270302351] [2023-02-18 00:20:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:38,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:39,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270302351] [2023-02-18 00:20:39,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270302351] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554893237] [2023-02-18 00:20:39,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:20:39,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:39,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:39,526 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 00:20:39,564 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 00:20:39,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2023-02-18 00:20:39,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:39,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-18 00:20:39,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:40,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:40,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554893237] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:40,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:40,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 37 [2023-02-18 00:20:40,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421180192] [2023-02-18 00:20:40,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:40,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 00:20:40,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:40,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 00:20:40,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 00:20:40,443 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 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 00:20:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:40,693 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2023-02-18 00:20:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-18 00:20:40,694 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 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 128 [2023-02-18 00:20:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:40,694 INFO L225 Difference]: With dead ends: 140 [2023-02-18 00:20:40,695 INFO L226 Difference]: Without dead ends: 138 [2023-02-18 00:20:40,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 162 SyntacticMatches, 122 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3277 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1757, Invalid=3073, Unknown=0, NotChecked=0, Total=4830 [2023-02-18 00:20:40,695 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 132 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:40,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 32 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-18 00:20:40,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2023-02-18 00:20:40,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 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 00:20:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2023-02-18 00:20:40,713 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2023-02-18 00:20:40,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:40,714 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2023-02-18 00:20:40,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 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 00:20:40,714 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2023-02-18 00:20:40,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-18 00:20:40,714 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:40,714 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:40,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:40,919 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 00:20:40,919 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:40,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:40,920 INFO L85 PathProgramCache]: Analyzing trace with hash -41671731, now seen corresponding path program 61 times [2023-02-18 00:20:40,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:40,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929572218] [2023-02-18 00:20:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:40,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1366 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:41,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:41,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929572218] [2023-02-18 00:20:41,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929572218] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:41,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967366876] [2023-02-18 00:20:41,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:20:41,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:41,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:41,931 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 00:20:41,932 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 00:20:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:42,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-18 00:20:42,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:43,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:44,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967366876] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:44,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:44,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 101 [2023-02-18 00:20:44,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269309001] [2023-02-18 00:20:44,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:44,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-02-18 00:20:44,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:44,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-02-18 00:20:44,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=7818, Unknown=0, NotChecked=0, Total=10100 [2023-02-18 00:20:44,252 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:45,090 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2023-02-18 00:20:45,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-18 00:20:45,090 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2023-02-18 00:20:45,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:45,091 INFO L225 Difference]: With dead ends: 233 [2023-02-18 00:20:45,091 INFO L226 Difference]: Without dead ends: 133 [2023-02-18 00:20:45,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 133 SyntacticMatches, 95 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8221 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3968, Invalid=13854, Unknown=0, NotChecked=0, Total=17822 [2023-02-18 00:20:45,092 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:45,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 387 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:20:45,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-18 00:20:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-02-18 00:20:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2023-02-18 00:20:45,110 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2023-02-18 00:20:45,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:45,110 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2023-02-18 00:20:45,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2023-02-18 00:20:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-02-18 00:20:45,110 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:45,111 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:45,116 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 00:20:45,315 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 00:20:45,316 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:45,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:45,316 INFO L85 PathProgramCache]: Analyzing trace with hash 341516168, now seen corresponding path program 62 times [2023-02-18 00:20:45,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:45,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098918315] [2023-02-18 00:20:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:45,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:45,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:45,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098918315] [2023-02-18 00:20:45,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098918315] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:45,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393860568] [2023-02-18 00:20:45,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:20:45,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:45,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:45,967 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 00:20:45,969 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 00:20:46,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:20:46,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:46,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 00:20:46,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:46,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:47,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393860568] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:47,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:47,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 38 [2023-02-18 00:20:47,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220513546] [2023-02-18 00:20:47,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:47,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-18 00:20:47,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:47,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-18 00:20:47,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 00:20:47,185 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 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 00:20:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:47,471 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2023-02-18 00:20:47,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-18 00:20:47,471 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 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 132 [2023-02-18 00:20:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:47,472 INFO L225 Difference]: With dead ends: 144 [2023-02-18 00:20:47,472 INFO L226 Difference]: Without dead ends: 142 [2023-02-18 00:20:47,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 167 SyntacticMatches, 126 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1861, Invalid=3251, Unknown=0, NotChecked=0, Total=5112 [2023-02-18 00:20:47,473 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 72 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:47,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 35 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:47,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-02-18 00:20:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2023-02-18 00:20:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 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 00:20:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2023-02-18 00:20:47,497 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2023-02-18 00:20:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:47,498 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2023-02-18 00:20:47,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 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 00:20:47,498 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2023-02-18 00:20:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-02-18 00:20:47,498 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:47,499 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:47,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:47,703 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 00:20:47,703 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash -664543055, now seen corresponding path program 63 times [2023-02-18 00:20:47,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:47,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026408913] [2023-02-18 00:20:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:47,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1458 proven. 622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:48,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:48,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026408913] [2023-02-18 00:20:48,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026408913] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:48,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127204937] [2023-02-18 00:20:48,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:20:48,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:48,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:48,780 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 00:20:48,781 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 00:20:48,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2023-02-18 00:20:48,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:48,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-18 00:20:48,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:50,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:51,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127204937] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:51,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:51,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 104 [2023-02-18 00:20:51,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520457218] [2023-02-18 00:20:51,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:51,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-02-18 00:20:51,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:51,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-02-18 00:20:51,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=8293, Unknown=0, NotChecked=0, Total=10712 [2023-02-18 00:20:51,375 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:52,297 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2023-02-18 00:20:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-18 00:20:52,298 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2023-02-18 00:20:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:52,298 INFO L225 Difference]: With dead ends: 240 [2023-02-18 00:20:52,299 INFO L226 Difference]: Without dead ends: 137 [2023-02-18 00:20:52,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 137 SyntacticMatches, 98 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8726 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4207, Invalid=14699, Unknown=0, NotChecked=0, Total=18906 [2023-02-18 00:20:52,301 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:52,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 375 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:20:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-18 00:20:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-02-18 00:20:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 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 00:20:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2023-02-18 00:20:52,338 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 135 [2023-02-18 00:20:52,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:52,338 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2023-02-18 00:20:52,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:52,339 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2023-02-18 00:20:52,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-02-18 00:20:52,339 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:52,339 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:52,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:52,544 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 00:20:52,545 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:52,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:52,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1871742700, now seen corresponding path program 64 times [2023-02-18 00:20:52,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:52,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132700373] [2023-02-18 00:20:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:52,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 528 proven. 1585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:53,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:53,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132700373] [2023-02-18 00:20:53,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132700373] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:53,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743966825] [2023-02-18 00:20:53,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:20:53,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:53,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:53,198 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 00:20:53,200 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 00:20:53,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:20:53,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:53,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-18 00:20:53,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:53,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:54,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743966825] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:54,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:54,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 39 [2023-02-18 00:20:54,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448059275] [2023-02-18 00:20:54,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:54,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 00:20:54,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 00:20:54,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 00:20:54,262 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 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 00:20:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:54,558 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2023-02-18 00:20:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-18 00:20:54,558 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 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 136 [2023-02-18 00:20:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:54,559 INFO L225 Difference]: With dead ends: 148 [2023-02-18 00:20:54,559 INFO L226 Difference]: Without dead ends: 146 [2023-02-18 00:20:54,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 172 SyntacticMatches, 130 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3687 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1968, Invalid=3434, Unknown=0, NotChecked=0, Total=5402 [2023-02-18 00:20:54,560 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 140 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:54,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 33 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:20:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-18 00:20:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2023-02-18 00:20:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 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 00:20:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2023-02-18 00:20:54,579 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 136 [2023-02-18 00:20:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:54,579 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2023-02-18 00:20:54,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 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 00:20:54,580 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2023-02-18 00:20:54,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-02-18 00:20:54,580 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:54,580 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:54,587 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 00:20:54,784 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 00:20:54,785 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:54,785 INFO L85 PathProgramCache]: Analyzing trace with hash -468807987, now seen corresponding path program 65 times [2023-02-18 00:20:54,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:54,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623559926] [2023-02-18 00:20:54,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:54,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:20:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1553 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:56,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:20:56,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623559926] [2023-02-18 00:20:56,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623559926] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:20:56,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668921415] [2023-02-18 00:20:56,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:20:56,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:20:56,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:20:56,376 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 00:20:56,378 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 00:20:56,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2023-02-18 00:20:56,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:20:56,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 00:20:56,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:20:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:57,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:20:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:20:58,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668921415] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:20:58,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:20:58,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 107 [2023-02-18 00:20:58,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384618008] [2023-02-18 00:20:58,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:20:58,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-02-18 00:20:58,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:20:58,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-02-18 00:20:58,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=8782, Unknown=0, NotChecked=0, Total=11342 [2023-02-18 00:20:58,430 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:20:59,150 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2023-02-18 00:20:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-18 00:20:59,150 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-02-18 00:20:59,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:20:59,150 INFO L225 Difference]: With dead ends: 247 [2023-02-18 00:20:59,150 INFO L226 Difference]: Without dead ends: 141 [2023-02-18 00:20:59,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 141 SyntacticMatches, 101 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9246 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4453, Invalid=15569, Unknown=0, NotChecked=0, Total=20022 [2023-02-18 00:20:59,153 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:20:59,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 360 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:20:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-18 00:20:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-02-18 00:20:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 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 00:20:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2023-02-18 00:20:59,181 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2023-02-18 00:20:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:20:59,181 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2023-02-18 00:20:59,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:20:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2023-02-18 00:20:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-02-18 00:20:59,182 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:20:59,182 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2023-02-18 00:20:59,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-02-18 00:20:59,387 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 00:20:59,388 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:20:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:20:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash 733454216, now seen corresponding path program 66 times [2023-02-18 00:20:59,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:20:59,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648848908] [2023-02-18 00:20:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:20:59,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:20:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:00,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:00,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648848908] [2023-02-18 00:21:00,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648848908] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:00,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391807345] [2023-02-18 00:21:00,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:21:00,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:00,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:00,091 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 00:21:00,093 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 00:21:00,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2023-02-18 00:21:00,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:00,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-18 00:21:00,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:00,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:01,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391807345] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:01,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:01,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 40 [2023-02-18 00:21:01,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785114952] [2023-02-18 00:21:01,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:01,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 00:21:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:01,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 00:21:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 00:21:01,189 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 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 00:21:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:01,479 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2023-02-18 00:21:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-02-18 00:21:01,480 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 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 140 [2023-02-18 00:21:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:01,480 INFO L225 Difference]: With dead ends: 152 [2023-02-18 00:21:01,480 INFO L226 Difference]: Without dead ends: 150 [2023-02-18 00:21:01,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 177 SyntacticMatches, 134 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3901 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2078, Invalid=3622, Unknown=0, NotChecked=0, Total=5700 [2023-02-18 00:21:01,481 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:01,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 34 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:01,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-18 00:21:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2023-02-18 00:21:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 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 00:21:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2023-02-18 00:21:01,502 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2023-02-18 00:21:01,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:01,502 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2023-02-18 00:21:01,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 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 00:21:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2023-02-18 00:21:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-02-18 00:21:01,503 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:01,503 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:01,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-02-18 00:21:01,708 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 00:21:01,708 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:01,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:01,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1840734385, now seen corresponding path program 67 times [2023-02-18 00:21:01,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:01,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420079394] [2023-02-18 00:21:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:01,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1651 proven. 695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:03,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:03,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420079394] [2023-02-18 00:21:03,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420079394] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:03,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397503767] [2023-02-18 00:21:03,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:21:03,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:03,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:03,130 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 00:21:03,131 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 00:21:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:03,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-18 00:21:03,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:04,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:05,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397503767] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:05,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:05,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 110 [2023-02-18 00:21:05,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164883291] [2023-02-18 00:21:05,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:05,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-02-18 00:21:05,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:05,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-02-18 00:21:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=9285, Unknown=0, NotChecked=0, Total=11990 [2023-02-18 00:21:05,314 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:05,942 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2023-02-18 00:21:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-18 00:21:05,943 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2023-02-18 00:21:05,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:05,943 INFO L225 Difference]: With dead ends: 254 [2023-02-18 00:21:05,943 INFO L226 Difference]: Without dead ends: 145 [2023-02-18 00:21:05,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 145 SyntacticMatches, 104 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9781 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4706, Invalid=16464, Unknown=0, NotChecked=0, Total=21170 [2023-02-18 00:21:05,945 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:05,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 301 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-18 00:21:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-02-18 00:21:05,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 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 00:21:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2023-02-18 00:21:05,985 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2023-02-18 00:21:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:05,985 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2023-02-18 00:21:05,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2023-02-18 00:21:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-02-18 00:21:05,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:05,986 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:05,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-02-18 00:21:06,191 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 00:21:06,192 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:06,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1532781588, now seen corresponding path program 68 times [2023-02-18 00:21:06,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:06,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346735035] [2023-02-18 00:21:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:06,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 595 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:07,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:07,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346735035] [2023-02-18 00:21:07,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346735035] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:07,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400230575] [2023-02-18 00:21:07,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:21:07,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:07,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:07,043 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 00:21:07,045 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 00:21:07,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:21:07,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:07,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-18 00:21:07,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:07,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:08,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400230575] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:08,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:08,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 41 [2023-02-18 00:21:08,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527042466] [2023-02-18 00:21:08,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:08,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-18 00:21:08,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:08,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-18 00:21:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 00:21:08,241 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 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 00:21:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:08,718 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2023-02-18 00:21:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-18 00:21:08,719 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 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 144 [2023-02-18 00:21:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:08,719 INFO L225 Difference]: With dead ends: 156 [2023-02-18 00:21:08,720 INFO L226 Difference]: Without dead ends: 154 [2023-02-18 00:21:08,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 182 SyntacticMatches, 138 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4121 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2191, Invalid=3815, Unknown=0, NotChecked=0, Total=6006 [2023-02-18 00:21:08,721 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 148 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:08,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 41 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:08,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-02-18 00:21:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2023-02-18 00:21:08,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 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 00:21:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2023-02-18 00:21:08,743 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2023-02-18 00:21:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:08,743 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2023-02-18 00:21:08,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 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 00:21:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2023-02-18 00:21:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-02-18 00:21:08,744 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:08,744 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:08,762 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 00:21:08,949 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 00:21:08,950 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:08,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:08,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1000823245, now seen corresponding path program 69 times [2023-02-18 00:21:08,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:08,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480526776] [2023-02-18 00:21:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:08,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1752 proven. 733 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:10,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:10,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480526776] [2023-02-18 00:21:10,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480526776] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:10,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448873358] [2023-02-18 00:21:10,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:21:10,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:10,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:10,242 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 00:21:10,245 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 00:21:10,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2023-02-18 00:21:10,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:10,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-18 00:21:10,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:12,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:13,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448873358] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:13,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:13,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 113 [2023-02-18 00:21:13,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464463943] [2023-02-18 00:21:13,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:13,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-02-18 00:21:13,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:13,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-02-18 00:21:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=9802, Unknown=0, NotChecked=0, Total=12656 [2023-02-18 00:21:13,235 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:13,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:13,959 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2023-02-18 00:21:13,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-02-18 00:21:13,960 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2023-02-18 00:21:13,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:13,981 INFO L225 Difference]: With dead ends: 261 [2023-02-18 00:21:13,981 INFO L226 Difference]: Without dead ends: 149 [2023-02-18 00:21:13,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 149 SyntacticMatches, 107 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10331 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4966, Invalid=17384, Unknown=0, NotChecked=0, Total=22350 [2023-02-18 00:21:13,982 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:13,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 368 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:21:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-18 00:21:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-02-18 00:21:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 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 00:21:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2023-02-18 00:21:14,005 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2023-02-18 00:21:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:14,005 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2023-02-18 00:21:14,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2023-02-18 00:21:14,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-02-18 00:21:14,006 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:14,006 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:14,023 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 00:21:14,212 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 00:21:14,212 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:14,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1597865864, now seen corresponding path program 70 times [2023-02-18 00:21:14,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:14,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619733083] [2023-02-18 00:21:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:14,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 630 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:15,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:15,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619733083] [2023-02-18 00:21:15,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619733083] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:15,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520262747] [2023-02-18 00:21:15,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:21:15,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:15,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:15,090 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 00:21:15,092 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 00:21:15,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:21:15,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:15,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-18 00:21:15,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:15,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:16,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520262747] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:16,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:16,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 42 [2023-02-18 00:21:16,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694805943] [2023-02-18 00:21:16,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:16,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-18 00:21:16,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:16,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-18 00:21:16,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 00:21:16,395 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 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 00:21:16,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:16,707 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2023-02-18 00:21:16,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-18 00:21:16,707 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 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 148 [2023-02-18 00:21:16,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:16,708 INFO L225 Difference]: With dead ends: 160 [2023-02-18 00:21:16,708 INFO L226 Difference]: Without dead ends: 158 [2023-02-18 00:21:16,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 187 SyntacticMatches, 142 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4347 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2307, Invalid=4013, Unknown=0, NotChecked=0, Total=6320 [2023-02-18 00:21:16,710 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 82 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:16,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 32 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:16,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-18 00:21:16,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2023-02-18 00:21:16,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 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 00:21:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2023-02-18 00:21:16,732 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2023-02-18 00:21:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:16,733 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2023-02-18 00:21:16,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 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 00:21:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2023-02-18 00:21:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-02-18 00:21:16,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:16,733 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:16,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-02-18 00:21:16,938 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 00:21:16,939 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:16,939 INFO L85 PathProgramCache]: Analyzing trace with hash 904233137, now seen corresponding path program 71 times [2023-02-18 00:21:16,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:16,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628997101] [2023-02-18 00:21:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:16,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1856 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:18,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:18,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628997101] [2023-02-18 00:21:18,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628997101] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:18,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890776518] [2023-02-18 00:21:18,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:21:18,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:18,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:18,721 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 00:21:18,723 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 00:21:18,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2023-02-18 00:21:18,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:18,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-18 00:21:18,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:20,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:21,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890776518] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:21,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:21,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 116 [2023-02-18 00:21:21,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575794846] [2023-02-18 00:21:21,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:21,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-02-18 00:21:21,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:21,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-02-18 00:21:21,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3007, Invalid=10333, Unknown=0, NotChecked=0, Total=13340 [2023-02-18 00:21:21,773 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:22,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:22,891 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2023-02-18 00:21:22,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-18 00:21:22,891 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-02-18 00:21:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:22,892 INFO L225 Difference]: With dead ends: 268 [2023-02-18 00:21:22,892 INFO L226 Difference]: Without dead ends: 153 [2023-02-18 00:21:22,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 153 SyntacticMatches, 110 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10896 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5233, Invalid=18329, Unknown=0, NotChecked=0, Total=23562 [2023-02-18 00:21:22,893 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:22,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 498 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:21:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-18 00:21:22,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-02-18 00:21:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 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 00:21:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2023-02-18 00:21:22,917 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2023-02-18 00:21:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:22,917 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2023-02-18 00:21:22,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2023-02-18 00:21:22,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-02-18 00:21:22,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:22,918 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:22,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-02-18 00:21:23,125 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 00:21:23,125 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:23,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:23,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1305718548, now seen corresponding path program 72 times [2023-02-18 00:21:23,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:23,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777775421] [2023-02-18 00:21:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:23,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 666 proven. 1999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:23,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:23,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777775421] [2023-02-18 00:21:23,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777775421] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:23,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334293470] [2023-02-18 00:21:23,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:21:23,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:23,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:23,966 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 00:21:23,966 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 00:21:24,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2023-02-18 00:21:24,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:24,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-18 00:21:24,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:24,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:25,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334293470] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:25,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:25,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 43 [2023-02-18 00:21:25,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407966371] [2023-02-18 00:21:25,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:25,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 00:21:25,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:25,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 00:21:25,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 00:21:25,424 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 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 00:21:25,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:25,758 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2023-02-18 00:21:25,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-02-18 00:21:25,758 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 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 152 [2023-02-18 00:21:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:25,759 INFO L225 Difference]: With dead ends: 164 [2023-02-18 00:21:25,759 INFO L226 Difference]: Without dead ends: 162 [2023-02-18 00:21:25,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 192 SyntacticMatches, 146 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4579 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2426, Invalid=4216, Unknown=0, NotChecked=0, Total=6642 [2023-02-18 00:21:25,760 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 156 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:25,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 23 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-18 00:21:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2023-02-18 00:21:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 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 00:21:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2023-02-18 00:21:25,785 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2023-02-18 00:21:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:25,785 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2023-02-18 00:21:25,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 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 00:21:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2023-02-18 00:21:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-02-18 00:21:25,786 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:25,786 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:25,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-02-18 00:21:25,990 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 00:21:25,991 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:25,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:25,991 INFO L85 PathProgramCache]: Analyzing trace with hash 862356685, now seen corresponding path program 73 times [2023-02-18 00:21:25,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:25,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565455570] [2023-02-18 00:21:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:25,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1963 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:27,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:27,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565455570] [2023-02-18 00:21:27,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565455570] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:27,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298635162] [2023-02-18 00:21:27,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:21:27,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:27,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:27,657 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 00:21:27,657 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 00:21:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:27,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-18 00:21:27,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:29,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:30,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298635162] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:30,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:30,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 119 [2023-02-18 00:21:30,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423749090] [2023-02-18 00:21:30,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:30,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-02-18 00:21:30,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:30,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-02-18 00:21:30,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3164, Invalid=10878, Unknown=0, NotChecked=0, Total=14042 [2023-02-18 00:21:30,266 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:31,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:31,120 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2023-02-18 00:21:31,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-18 00:21:31,120 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2023-02-18 00:21:31,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:31,120 INFO L225 Difference]: With dead ends: 275 [2023-02-18 00:21:31,120 INFO L226 Difference]: Without dead ends: 157 [2023-02-18 00:21:31,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 157 SyntacticMatches, 113 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11476 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5507, Invalid=19299, Unknown=0, NotChecked=0, Total=24806 [2023-02-18 00:21:31,122 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:31,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 615 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:21:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-18 00:21:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-02-18 00:21:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 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 00:21:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2023-02-18 00:21:31,146 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2023-02-18 00:21:31,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:31,146 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2023-02-18 00:21:31,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2023-02-18 00:21:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-18 00:21:31,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:31,147 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:31,152 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 00:21:31,351 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 00:21:31,352 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:31,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1828405368, now seen corresponding path program 74 times [2023-02-18 00:21:31,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:31,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142940128] [2023-02-18 00:21:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:31,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 703 proven. 2110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:32,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:32,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142940128] [2023-02-18 00:21:32,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142940128] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:32,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408062849] [2023-02-18 00:21:32,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:21:32,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:32,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:32,220 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 00:21:32,222 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 00:21:32,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:21:32,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:32,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-18 00:21:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:32,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:33,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408062849] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:33,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:33,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 44 [2023-02-18 00:21:33,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691990786] [2023-02-18 00:21:33,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:33,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 00:21:33,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:33,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 00:21:33,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 00:21:33,618 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 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 00:21:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:34,032 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2023-02-18 00:21:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-18 00:21:34,032 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 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 156 [2023-02-18 00:21:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:34,033 INFO L225 Difference]: With dead ends: 168 [2023-02-18 00:21:34,033 INFO L226 Difference]: Without dead ends: 166 [2023-02-18 00:21:34,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 197 SyntacticMatches, 150 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4817 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2548, Invalid=4424, Unknown=0, NotChecked=0, Total=6972 [2023-02-18 00:21:34,034 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 84 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:34,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 41 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:34,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-02-18 00:21:34,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2023-02-18 00:21:34,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 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 00:21:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2023-02-18 00:21:34,059 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 156 [2023-02-18 00:21:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:34,059 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2023-02-18 00:21:34,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 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 00:21:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2023-02-18 00:21:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-02-18 00:21:34,060 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:34,060 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:34,065 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 00:21:34,265 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 00:21:34,265 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:34,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1244249935, now seen corresponding path program 75 times [2023-02-18 00:21:34,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:34,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104851276] [2023-02-18 00:21:34,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:34,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2073 proven. 853 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:36,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:36,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104851276] [2023-02-18 00:21:36,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104851276] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:36,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019601178] [2023-02-18 00:21:36,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:21:36,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:36,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:36,336 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 00:21:36,338 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 00:21:36,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2023-02-18 00:21:36,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:36,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-18 00:21:36,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:37,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:39,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019601178] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:39,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:39,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 122 [2023-02-18 00:21:39,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519168872] [2023-02-18 00:21:39,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:39,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2023-02-18 00:21:39,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:39,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2023-02-18 00:21:39,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=11437, Unknown=0, NotChecked=0, Total=14762 [2023-02-18 00:21:39,306 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:40,265 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2023-02-18 00:21:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-02-18 00:21:40,265 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2023-02-18 00:21:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:40,266 INFO L225 Difference]: With dead ends: 282 [2023-02-18 00:21:40,266 INFO L226 Difference]: Without dead ends: 161 [2023-02-18 00:21:40,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 161 SyntacticMatches, 116 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12071 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5788, Invalid=20294, Unknown=0, NotChecked=0, Total=26082 [2023-02-18 00:21:40,267 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:40,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 526 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:21:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-02-18 00:21:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2023-02-18 00:21:40,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2023-02-18 00:21:40,293 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 159 [2023-02-18 00:21:40,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:40,293 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2023-02-18 00:21:40,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:40,293 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2023-02-18 00:21:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-02-18 00:21:40,294 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:40,294 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:40,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-02-18 00:21:40,499 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 00:21:40,500 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:40,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1376953836, now seen corresponding path program 76 times [2023-02-18 00:21:40,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:40,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176762568] [2023-02-18 00:21:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:40,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 741 proven. 2224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:41,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:41,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176762568] [2023-02-18 00:21:41,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176762568] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:41,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68172253] [2023-02-18 00:21:41,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:21:41,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:41,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:41,423 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 00:21:41,423 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 00:21:41,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:21:41,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-18 00:21:41,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:42,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:42,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68172253] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:42,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:42,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 45 [2023-02-18 00:21:42,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159887984] [2023-02-18 00:21:42,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:42,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-18 00:21:42,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:42,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-18 00:21:42,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 00:21:42,863 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:43,212 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2023-02-18 00:21:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-02-18 00:21:43,212 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2023-02-18 00:21:43,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:43,213 INFO L225 Difference]: With dead ends: 172 [2023-02-18 00:21:43,213 INFO L226 Difference]: Without dead ends: 170 [2023-02-18 00:21:43,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 202 SyntacticMatches, 154 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5061 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2673, Invalid=4637, Unknown=0, NotChecked=0, Total=7310 [2023-02-18 00:21:43,214 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 166 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:43,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 34 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-18 00:21:43,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2023-02-18 00:21:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2023-02-18 00:21:43,240 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 160 [2023-02-18 00:21:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:43,240 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2023-02-18 00:21:43,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:43,240 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2023-02-18 00:21:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-02-18 00:21:43,241 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:43,241 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:43,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-02-18 00:21:43,446 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 00:21:43,447 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:43,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:43,447 INFO L85 PathProgramCache]: Analyzing trace with hash -396095539, now seen corresponding path program 77 times [2023-02-18 00:21:43,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:43,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546647521] [2023-02-18 00:21:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:43,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2186 proven. 895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:45,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:45,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546647521] [2023-02-18 00:21:45,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546647521] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:45,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445020517] [2023-02-18 00:21:45,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:21:45,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:45,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:45,520 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 00:21:45,522 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 00:21:45,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2023-02-18 00:21:45,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:45,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-18 00:21:45,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:47,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:48,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445020517] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:48,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:48,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 125 [2023-02-18 00:21:48,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131547355] [2023-02-18 00:21:48,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:48,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-02-18 00:21:48,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:48,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-02-18 00:21:48,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3490, Invalid=12010, Unknown=0, NotChecked=0, Total=15500 [2023-02-18 00:21:48,772 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:49,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:49,714 INFO L93 Difference]: Finished difference Result 289 states and 291 transitions. [2023-02-18 00:21:49,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-18 00:21:49,714 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2023-02-18 00:21:49,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:49,715 INFO L225 Difference]: With dead ends: 289 [2023-02-18 00:21:49,715 INFO L226 Difference]: Without dead ends: 165 [2023-02-18 00:21:49,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 165 SyntacticMatches, 119 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12681 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6076, Invalid=21314, Unknown=0, NotChecked=0, Total=27390 [2023-02-18 00:21:49,717 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:49,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 450 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:21:49,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-18 00:21:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-02-18 00:21:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2023-02-18 00:21:49,769 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 163 [2023-02-18 00:21:49,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:49,769 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2023-02-18 00:21:49,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:49,770 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2023-02-18 00:21:49,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-02-18 00:21:49,770 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:49,770 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:49,776 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 00:21:49,976 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 00:21:49,977 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:49,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:49,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1725603960, now seen corresponding path program 78 times [2023-02-18 00:21:49,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:49,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911274831] [2023-02-18 00:21:49,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:49,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 780 proven. 2341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:50,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:50,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911274831] [2023-02-18 00:21:50,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911274831] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:50,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538030582] [2023-02-18 00:21:50,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:21:50,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:50,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:50,966 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 00:21:50,967 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 00:21:51,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2023-02-18 00:21:51,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:21:51,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-18 00:21:51,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:51,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:52,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538030582] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:52,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:52,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 46 [2023-02-18 00:21:52,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936626286] [2023-02-18 00:21:52,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:52,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-18 00:21:52,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:52,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-18 00:21:52,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 00:21:52,437 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:52,835 INFO L93 Difference]: Finished difference Result 176 states and 177 transitions. [2023-02-18 00:21:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-02-18 00:21:52,836 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2023-02-18 00:21:52,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:52,836 INFO L225 Difference]: With dead ends: 176 [2023-02-18 00:21:52,836 INFO L226 Difference]: Without dead ends: 174 [2023-02-18 00:21:52,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 207 SyntacticMatches, 158 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5311 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2801, Invalid=4855, Unknown=0, NotChecked=0, Total=7656 [2023-02-18 00:21:52,837 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:52,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 41 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:21:52,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-02-18 00:21:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2023-02-18 00:21:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2023-02-18 00:21:52,872 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 164 [2023-02-18 00:21:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:52,872 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2023-02-18 00:21:52,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2023-02-18 00:21:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-02-18 00:21:52,873 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:52,873 INFO L195 NwaCegarLoop]: trace histogram [41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:52,880 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 00:21:53,078 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 00:21:53,079 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:53,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:53,079 INFO L85 PathProgramCache]: Analyzing trace with hash -999186255, now seen corresponding path program 79 times [2023-02-18 00:21:53,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:53,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901073321] [2023-02-18 00:21:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:53,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2302 proven. 938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:54,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:21:54,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901073321] [2023-02-18 00:21:54,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901073321] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:21:54,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123032267] [2023-02-18 00:21:54,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:21:54,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:21:54,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:21:54,710 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 00:21:54,711 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 00:21:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:21:54,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-18 00:21:54,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:21:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:56,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:21:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:21:57,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123032267] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:21:57,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:21:57,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 128 [2023-02-18 00:21:57,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413882119] [2023-02-18 00:21:57,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:21:57,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2023-02-18 00:21:57,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:21:57,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2023-02-18 00:21:57,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=12597, Unknown=0, NotChecked=0, Total=16256 [2023-02-18 00:21:57,529 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 128 states, 128 states have (on average 2.3046875) internal successors, (295), 128 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:58,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:21:58,619 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2023-02-18 00:21:58,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-02-18 00:21:58,619 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.3046875) internal successors, (295), 128 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2023-02-18 00:21:58,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:21:58,620 INFO L225 Difference]: With dead ends: 296 [2023-02-18 00:21:58,620 INFO L226 Difference]: Without dead ends: 169 [2023-02-18 00:21:58,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 169 SyntacticMatches, 122 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13306 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6371, Invalid=22359, Unknown=0, NotChecked=0, Total=28730 [2023-02-18 00:21:58,622 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:21:58,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 436 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:21:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-18 00:21:58,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-18 00:21:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2023-02-18 00:21:58,650 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 167 [2023-02-18 00:21:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:21:58,650 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2023-02-18 00:21:58,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.3046875) internal successors, (295), 128 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:21:58,651 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2023-02-18 00:21:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-02-18 00:21:58,651 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:21:58,651 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2023-02-18 00:21:58,657 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 00:21:58,856 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 00:21:58,856 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:21:58,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:21:58,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1874945300, now seen corresponding path program 80 times [2023-02-18 00:21:58,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:21:58,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121549042] [2023-02-18 00:21:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:21:58,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:21:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 820 proven. 2461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:00,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:00,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121549042] [2023-02-18 00:22:00,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121549042] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:00,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951388668] [2023-02-18 00:22:00,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:22:00,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:00,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:00,063 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 00:22:00,067 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 00:22:00,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:22:00,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:00,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-18 00:22:00,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:01,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:02,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951388668] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:02,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:02,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 47 [2023-02-18 00:22:02,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374496710] [2023-02-18 00:22:02,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:02,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 00:22:02,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:02,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 00:22:02,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 00:22:02,337 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:02,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:02,814 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2023-02-18 00:22:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-18 00:22:02,815 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2023-02-18 00:22:02,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:02,816 INFO L225 Difference]: With dead ends: 180 [2023-02-18 00:22:02,816 INFO L226 Difference]: Without dead ends: 178 [2023-02-18 00:22:02,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 212 SyntacticMatches, 162 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5567 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2932, Invalid=5078, Unknown=0, NotChecked=0, Total=8010 [2023-02-18 00:22:02,817 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:02,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 35 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:22:02,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-18 00:22:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2023-02-18 00:22:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:02,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2023-02-18 00:22:02,845 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 168 [2023-02-18 00:22:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:02,845 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2023-02-18 00:22:02,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:02,846 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2023-02-18 00:22:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-02-18 00:22:02,846 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:02,846 INFO L195 NwaCegarLoop]: trace histogram [42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:02,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2023-02-18 00:22:03,051 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 00:22:03,052 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:03,052 INFO L85 PathProgramCache]: Analyzing trace with hash -440927539, now seen corresponding path program 81 times [2023-02-18 00:22:03,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:03,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724870837] [2023-02-18 00:22:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:03,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2421 proven. 982 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:05,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:05,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724870837] [2023-02-18 00:22:05,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724870837] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:05,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835229325] [2023-02-18 00:22:05,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:22:05,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:05,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:05,043 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 00:22:05,044 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 00:22:05,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2023-02-18 00:22:05,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:05,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-18 00:22:05,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:07,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:08,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835229325] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:08,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:08,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 131 [2023-02-18 00:22:08,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272307732] [2023-02-18 00:22:08,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:08,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2023-02-18 00:22:08,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:08,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2023-02-18 00:22:08,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3832, Invalid=13198, Unknown=0, NotChecked=0, Total=17030 [2023-02-18 00:22:08,395 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:09,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:09,435 INFO L93 Difference]: Finished difference Result 303 states and 305 transitions. [2023-02-18 00:22:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-02-18 00:22:09,435 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2023-02-18 00:22:09,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:09,436 INFO L225 Difference]: With dead ends: 303 [2023-02-18 00:22:09,436 INFO L226 Difference]: Without dead ends: 173 [2023-02-18 00:22:09,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 173 SyntacticMatches, 125 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13946 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6673, Invalid=23429, Unknown=0, NotChecked=0, Total=30102 [2023-02-18 00:22:09,437 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:09,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 520 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:22:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-18 00:22:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2023-02-18 00:22:09,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2023-02-18 00:22:09,466 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 171 [2023-02-18 00:22:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:09,466 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2023-02-18 00:22:09,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2023-02-18 00:22:09,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-02-18 00:22:09,469 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:09,469 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:09,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2023-02-18 00:22:09,674 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 00:22:09,675 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:09,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:09,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1313382520, now seen corresponding path program 82 times [2023-02-18 00:22:09,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:09,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454386888] [2023-02-18 00:22:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:09,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 861 proven. 2584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:10,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:10,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454386888] [2023-02-18 00:22:10,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454386888] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:10,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875908182] [2023-02-18 00:22:10,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:22:10,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:10,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:10,783 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 00:22:10,783 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 00:22:10,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:22:10,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:10,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 90 conjunts are in the unsatisfiable core [2023-02-18 00:22:10,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:11,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:12,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875908182] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:12,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:12,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 48 [2023-02-18 00:22:12,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282858248] [2023-02-18 00:22:12,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:12,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 00:22:12,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:12,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 00:22:12,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 00:22:12,325 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:12,755 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2023-02-18 00:22:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-02-18 00:22:12,758 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2023-02-18 00:22:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:12,758 INFO L225 Difference]: With dead ends: 184 [2023-02-18 00:22:12,759 INFO L226 Difference]: Without dead ends: 182 [2023-02-18 00:22:12,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 217 SyntacticMatches, 166 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5829 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3066, Invalid=5306, Unknown=0, NotChecked=0, Total=8372 [2023-02-18 00:22:12,759 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:12,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 37 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:22:12,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-18 00:22:12,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2023-02-18 00:22:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2023-02-18 00:22:12,791 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 172 [2023-02-18 00:22:12,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:12,791 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2023-02-18 00:22:12,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2023-02-18 00:22:12,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-02-18 00:22:12,792 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:12,792 INFO L195 NwaCegarLoop]: trace histogram [43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:12,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-02-18 00:22:12,997 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 00:22:12,998 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:12,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:12,998 INFO L85 PathProgramCache]: Analyzing trace with hash 178233521, now seen corresponding path program 83 times [2023-02-18 00:22:12,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:12,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432526141] [2023-02-18 00:22:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:12,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2543 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:14,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:14,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432526141] [2023-02-18 00:22:14,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432526141] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:14,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773799914] [2023-02-18 00:22:14,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:22:14,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:14,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:14,892 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 00:22:14,893 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 00:22:15,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2023-02-18 00:22:15,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:15,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-18 00:22:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:17,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:18,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773799914] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:18,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:18,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 134 [2023-02-18 00:22:18,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992650568] [2023-02-18 00:22:18,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:18,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2023-02-18 00:22:18,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:18,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2023-02-18 00:22:18,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4009, Invalid=13813, Unknown=0, NotChecked=0, Total=17822 [2023-02-18 00:22:18,689 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:19,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:19,725 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2023-02-18 00:22:19,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-18 00:22:19,725 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2023-02-18 00:22:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:19,726 INFO L225 Difference]: With dead ends: 310 [2023-02-18 00:22:19,726 INFO L226 Difference]: Without dead ends: 177 [2023-02-18 00:22:19,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 177 SyntacticMatches, 128 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14601 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6982, Invalid=24524, Unknown=0, NotChecked=0, Total=31506 [2023-02-18 00:22:19,727 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:19,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 651 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:22:19,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-18 00:22:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2023-02-18 00:22:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2023-02-18 00:22:19,762 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 175 [2023-02-18 00:22:19,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:19,762 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2023-02-18 00:22:19,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2023-02-18 00:22:19,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-02-18 00:22:19,763 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:19,763 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:19,769 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 00:22:19,968 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 00:22:19,969 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1251487724, now seen corresponding path program 84 times [2023-02-18 00:22:19,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:19,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851466900] [2023-02-18 00:22:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:19,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 903 proven. 2710 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:21,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:21,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851466900] [2023-02-18 00:22:21,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851466900] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:21,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116175164] [2023-02-18 00:22:21,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:22:21,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:21,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:21,101 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 00:22:21,103 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 00:22:21,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2023-02-18 00:22:21,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:21,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-18 00:22:21,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:22,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:22,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116175164] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:22,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:22,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 49 [2023-02-18 00:22:22,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396631013] [2023-02-18 00:22:22,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:22,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 00:22:22,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 00:22:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 00:22:22,767 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:23,356 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions. [2023-02-18 00:22:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-02-18 00:22:23,356 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2023-02-18 00:22:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:23,357 INFO L225 Difference]: With dead ends: 188 [2023-02-18 00:22:23,357 INFO L226 Difference]: Without dead ends: 186 [2023-02-18 00:22:23,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 222 SyntacticMatches, 170 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6097 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3203, Invalid=5539, Unknown=0, NotChecked=0, Total=8742 [2023-02-18 00:22:23,358 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 180 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:23,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 29 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:22:23,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-02-18 00:22:23,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 180. [2023-02-18 00:22:23,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2023-02-18 00:22:23,389 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 176 [2023-02-18 00:22:23,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:23,389 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2023-02-18 00:22:23,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:23,389 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2023-02-18 00:22:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-02-18 00:22:23,390 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:23,390 INFO L195 NwaCegarLoop]: trace histogram [44, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:23,395 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 00:22:23,596 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 00:22:23,596 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:23,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1535490611, now seen corresponding path program 85 times [2023-02-18 00:22:23,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:23,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430407054] [2023-02-18 00:22:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:23,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2668 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:25,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:25,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430407054] [2023-02-18 00:22:25,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430407054] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:25,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575910276] [2023-02-18 00:22:25,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:22:25,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:25,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:25,610 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 00:22:25,610 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 00:22:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:25,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 90 conjunts are in the unsatisfiable core [2023-02-18 00:22:25,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:27,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:28,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575910276] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:28,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:28,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 137 [2023-02-18 00:22:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61551454] [2023-02-18 00:22:28,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:28,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2023-02-18 00:22:28,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:28,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2023-02-18 00:22:28,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4190, Invalid=14442, Unknown=0, NotChecked=0, Total=18632 [2023-02-18 00:22:28,780 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 137 states, 137 states have (on average 2.3065693430656933) internal successors, (316), 137 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:29,820 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2023-02-18 00:22:29,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-02-18 00:22:29,820 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.3065693430656933) internal successors, (316), 137 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2023-02-18 00:22:29,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:29,821 INFO L225 Difference]: With dead ends: 317 [2023-02-18 00:22:29,821 INFO L226 Difference]: Without dead ends: 181 [2023-02-18 00:22:29,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 181 SyntacticMatches, 131 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15271 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7298, Invalid=25644, Unknown=0, NotChecked=0, Total=32942 [2023-02-18 00:22:29,823 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:29,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 567 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:22:29,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-18 00:22:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-02-18 00:22:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2023-02-18 00:22:29,854 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 179 [2023-02-18 00:22:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:29,854 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2023-02-18 00:22:29,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.3065693430656933) internal successors, (316), 137 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2023-02-18 00:22:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-02-18 00:22:29,855 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:29,855 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:29,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2023-02-18 00:22:30,062 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 00:22:30,062 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:30,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:30,062 INFO L85 PathProgramCache]: Analyzing trace with hash 181583752, now seen corresponding path program 86 times [2023-02-18 00:22:30,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:30,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781599933] [2023-02-18 00:22:30,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:30,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 946 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:31,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:31,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781599933] [2023-02-18 00:22:31,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781599933] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:31,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300693475] [2023-02-18 00:22:31,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:22:31,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:31,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:31,228 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 00:22:31,229 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 00:22:31,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:22:31,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:31,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 94 conjunts are in the unsatisfiable core [2023-02-18 00:22:31,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:32,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:32,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300693475] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:32,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:32,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 50 [2023-02-18 00:22:32,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364213907] [2023-02-18 00:22:32,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:32,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 00:22:32,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:32,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 00:22:32,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1089, Invalid=1361, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 00:22:32,959 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:33,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:33,412 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2023-02-18 00:22:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-18 00:22:33,413 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2023-02-18 00:22:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:33,413 INFO L225 Difference]: With dead ends: 192 [2023-02-18 00:22:33,414 INFO L226 Difference]: Without dead ends: 190 [2023-02-18 00:22:33,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 227 SyntacticMatches, 174 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6371 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3343, Invalid=5777, Unknown=0, NotChecked=0, Total=9120 [2023-02-18 00:22:33,415 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 186 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:33,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 37 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:22:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-18 00:22:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2023-02-18 00:22:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2023-02-18 00:22:33,462 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 180 [2023-02-18 00:22:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:33,477 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2023-02-18 00:22:33,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2023-02-18 00:22:33,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-18 00:22:33,478 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:33,478 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:33,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2023-02-18 00:22:33,683 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 00:22:33,683 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:33,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:33,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2092416847, now seen corresponding path program 87 times [2023-02-18 00:22:33,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:33,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258525117] [2023-02-18 00:22:33,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:33,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2796 proven. 1120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:35,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:35,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258525117] [2023-02-18 00:22:35,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258525117] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:35,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398116936] [2023-02-18 00:22:35,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:22:35,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:35,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:35,912 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 00:22:35,914 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 00:22:36,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2023-02-18 00:22:36,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:36,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-18 00:22:36,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:38,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:39,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398116936] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:39,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:39,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 140 [2023-02-18 00:22:39,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947002063] [2023-02-18 00:22:39,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:39,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2023-02-18 00:22:39,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:39,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2023-02-18 00:22:39,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4375, Invalid=15085, Unknown=0, NotChecked=0, Total=19460 [2023-02-18 00:22:39,735 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 140 states, 140 states have (on average 2.307142857142857) internal successors, (323), 140 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:40,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:40,871 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2023-02-18 00:22:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-02-18 00:22:40,871 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.307142857142857) internal successors, (323), 140 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2023-02-18 00:22:40,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:40,872 INFO L225 Difference]: With dead ends: 324 [2023-02-18 00:22:40,872 INFO L226 Difference]: Without dead ends: 185 [2023-02-18 00:22:40,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 185 SyntacticMatches, 134 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15956 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=7621, Invalid=26789, Unknown=0, NotChecked=0, Total=34410 [2023-02-18 00:22:40,881 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:40,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 528 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:22:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-18 00:22:40,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-02-18 00:22:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2023-02-18 00:22:40,915 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 183 [2023-02-18 00:22:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:40,915 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2023-02-18 00:22:40,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.307142857142857) internal successors, (323), 140 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2023-02-18 00:22:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-02-18 00:22:40,916 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:40,917 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:40,922 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 00:22:41,122 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 00:22:41,122 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:41,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:41,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1324915476, now seen corresponding path program 88 times [2023-02-18 00:22:41,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:41,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69101067] [2023-02-18 00:22:41,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:41,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 990 proven. 2971 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:42,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:42,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69101067] [2023-02-18 00:22:42,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69101067] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:42,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114948221] [2023-02-18 00:22:42,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:22:42,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:42,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:42,533 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 00:22:42,535 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 00:22:42,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:22:42,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:42,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-18 00:22:42,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:43,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:44,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114948221] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:44,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:44,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 51 [2023-02-18 00:22:44,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773023065] [2023-02-18 00:22:44,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:44,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-18 00:22:44,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:44,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-18 00:22:44,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 00:22:44,909 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:45,374 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2023-02-18 00:22:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-02-18 00:22:45,375 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2023-02-18 00:22:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:45,375 INFO L225 Difference]: With dead ends: 196 [2023-02-18 00:22:45,376 INFO L226 Difference]: Without dead ends: 194 [2023-02-18 00:22:45,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 232 SyntacticMatches, 178 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6651 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3486, Invalid=6020, Unknown=0, NotChecked=0, Total=9506 [2023-02-18 00:22:45,377 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:45,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 47 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:22:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-02-18 00:22:45,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2023-02-18 00:22:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:45,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2023-02-18 00:22:45,426 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 184 [2023-02-18 00:22:45,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:45,426 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2023-02-18 00:22:45,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:45,426 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2023-02-18 00:22:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-02-18 00:22:45,427 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:45,427 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:45,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2023-02-18 00:22:45,635 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 00:22:45,635 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:45,635 INFO L85 PathProgramCache]: Analyzing trace with hash 197325005, now seen corresponding path program 89 times [2023-02-18 00:22:45,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:45,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189084835] [2023-02-18 00:22:45,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:45,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 2927 proven. 1168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:47,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:47,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189084835] [2023-02-18 00:22:47,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189084835] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:47,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315868585] [2023-02-18 00:22:47,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:22:47,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:47,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:47,757 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 00:22:47,758 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 00:22:47,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2023-02-18 00:22:47,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:47,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 94 conjunts are in the unsatisfiable core [2023-02-18 00:22:47,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:49,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:51,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315868585] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:51,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:51,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 143 [2023-02-18 00:22:51,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598943208] [2023-02-18 00:22:51,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:51,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2023-02-18 00:22:51,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:51,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2023-02-18 00:22:51,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=15742, Unknown=0, NotChecked=0, Total=20306 [2023-02-18 00:22:51,432 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 143 states, 143 states have (on average 2.3076923076923075) internal successors, (330), 143 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:52,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:52,495 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2023-02-18 00:22:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-18 00:22:52,495 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.3076923076923075) internal successors, (330), 143 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2023-02-18 00:22:52,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:52,496 INFO L225 Difference]: With dead ends: 331 [2023-02-18 00:22:52,496 INFO L226 Difference]: Without dead ends: 189 [2023-02-18 00:22:52,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 189 SyntacticMatches, 137 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16656 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7951, Invalid=27959, Unknown=0, NotChecked=0, Total=35910 [2023-02-18 00:22:52,500 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:52,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 493 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:22:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-18 00:22:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-02-18 00:22:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2023-02-18 00:22:52,534 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 187 [2023-02-18 00:22:52,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:52,534 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2023-02-18 00:22:52,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.3076923076923075) internal successors, (330), 143 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:52,534 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2023-02-18 00:22:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-02-18 00:22:52,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:52,535 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:52,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2023-02-18 00:22:52,741 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 00:22:52,741 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:52,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1083146120, now seen corresponding path program 90 times [2023-02-18 00:22:52,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:52,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695709545] [2023-02-18 00:22:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:52,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:22:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1035 proven. 3106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:54,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:22:54,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695709545] [2023-02-18 00:22:54,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695709545] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:22:54,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732848534] [2023-02-18 00:22:54,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:22:54,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:22:54,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:22:54,175 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 00:22:54,176 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 00:22:54,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2023-02-18 00:22:54,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:22:54,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-18 00:22:54,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:22:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:55,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:22:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:22:57,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732848534] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:22:57,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:22:57,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 52 [2023-02-18 00:22:57,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919667070] [2023-02-18 00:22:57,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:22:57,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-18 00:22:57,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:22:57,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-18 00:22:57,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 00:22:57,135 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:57,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:22:57,821 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2023-02-18 00:22:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-02-18 00:22:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2023-02-18 00:22:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:22:57,822 INFO L225 Difference]: With dead ends: 200 [2023-02-18 00:22:57,822 INFO L226 Difference]: Without dead ends: 198 [2023-02-18 00:22:57,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 237 SyntacticMatches, 182 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6937 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3632, Invalid=6268, Unknown=0, NotChecked=0, Total=9900 [2023-02-18 00:22:57,823 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 192 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:22:57,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 35 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:22:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-02-18 00:22:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 192. [2023-02-18 00:22:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2023-02-18 00:22:57,858 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 188 [2023-02-18 00:22:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:22:57,858 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2023-02-18 00:22:57,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:22:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2023-02-18 00:22:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-02-18 00:22:57,859 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:22:57,859 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2023-02-18 00:22:57,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2023-02-18 00:22:58,059 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 00:22:58,060 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:22:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:22:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -78413647, now seen corresponding path program 91 times [2023-02-18 00:22:58,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:22:58,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887120350] [2023-02-18 00:22:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:22:58,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:22:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3061 proven. 1217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:00,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:00,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887120350] [2023-02-18 00:23:00,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887120350] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:00,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894088400] [2023-02-18 00:23:00,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:23:00,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:00,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:00,836 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 00:23:00,838 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 00:23:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:00,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-18 00:23:00,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:03,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:04,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894088400] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:04,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:04,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 146 [2023-02-18 00:23:04,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868716799] [2023-02-18 00:23:04,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:04,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2023-02-18 00:23:04,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:04,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2023-02-18 00:23:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4757, Invalid=16413, Unknown=0, NotChecked=0, Total=21170 [2023-02-18 00:23:04,396 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 146 states, 146 states have (on average 2.308219178082192) internal successors, (337), 146 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:05,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:05,533 INFO L93 Difference]: Finished difference Result 338 states and 340 transitions. [2023-02-18 00:23:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-02-18 00:23:05,534 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.308219178082192) internal successors, (337), 146 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2023-02-18 00:23:05,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:05,534 INFO L225 Difference]: With dead ends: 338 [2023-02-18 00:23:05,534 INFO L226 Difference]: Without dead ends: 193 [2023-02-18 00:23:05,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 193 SyntacticMatches, 140 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17371 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=8288, Invalid=29154, Unknown=0, NotChecked=0, Total=37442 [2023-02-18 00:23:05,536 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 8 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:05,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 629 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:23:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-18 00:23:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-02-18 00:23:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:05,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2023-02-18 00:23:05,571 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 191 [2023-02-18 00:23:05,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:05,571 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2023-02-18 00:23:05,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.308219178082192) internal successors, (337), 146 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2023-02-18 00:23:05,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-02-18 00:23:05,572 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:05,572 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:05,577 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 00:23:05,777 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 00:23:05,777 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:05,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:05,778 INFO L85 PathProgramCache]: Analyzing trace with hash -982238740, now seen corresponding path program 92 times [2023-02-18 00:23:05,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:05,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9193239] [2023-02-18 00:23:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:05,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1081 proven. 3244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:07,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:07,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9193239] [2023-02-18 00:23:07,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9193239] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:07,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083016678] [2023-02-18 00:23:07,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:23:07,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:07,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:07,120 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 00:23:07,121 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 00:23:07,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:23:07,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:07,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 100 conjunts are in the unsatisfiable core [2023-02-18 00:23:07,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:08,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:09,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083016678] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:09,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:09,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 53 [2023-02-18 00:23:09,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404239546] [2023-02-18 00:23:09,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:09,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-18 00:23:09,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:09,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-18 00:23:09,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 00:23:09,016 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:09,486 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2023-02-18 00:23:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-02-18 00:23:09,486 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2023-02-18 00:23:09,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:09,487 INFO L225 Difference]: With dead ends: 204 [2023-02-18 00:23:09,487 INFO L226 Difference]: Without dead ends: 202 [2023-02-18 00:23:09,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 242 SyntacticMatches, 186 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7229 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3781, Invalid=6521, Unknown=0, NotChecked=0, Total=10302 [2023-02-18 00:23:09,488 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 104 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:09,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 36 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:23:09,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-18 00:23:09,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2023-02-18 00:23:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 195 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2023-02-18 00:23:09,524 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 192 [2023-02-18 00:23:09,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:09,524 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2023-02-18 00:23:09,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2023-02-18 00:23:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-02-18 00:23:09,525 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:09,525 INFO L195 NwaCegarLoop]: trace histogram [48, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:09,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2023-02-18 00:23:09,731 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 00:23:09,731 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash -257295411, now seen corresponding path program 93 times [2023-02-18 00:23:09,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:09,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811943949] [2023-02-18 00:23:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:09,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3198 proven. 1267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:12,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:12,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811943949] [2023-02-18 00:23:12,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811943949] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:12,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112429003] [2023-02-18 00:23:12,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:23:12,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:12,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:12,016 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 00:23:12,030 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 00:23:12,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2023-02-18 00:23:12,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:12,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-18 00:23:12,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:14,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:15,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112429003] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:15,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:15,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 149 [2023-02-18 00:23:15,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118793030] [2023-02-18 00:23:15,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:15,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2023-02-18 00:23:15,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:15,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2023-02-18 00:23:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4954, Invalid=17098, Unknown=0, NotChecked=0, Total=22052 [2023-02-18 00:23:15,838 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 149 states, 149 states have (on average 2.3087248322147653) internal successors, (344), 149 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:17,000 INFO L93 Difference]: Finished difference Result 345 states and 347 transitions. [2023-02-18 00:23:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-02-18 00:23:17,001 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.3087248322147653) internal successors, (344), 149 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2023-02-18 00:23:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:17,001 INFO L225 Difference]: With dead ends: 345 [2023-02-18 00:23:17,001 INFO L226 Difference]: Without dead ends: 197 [2023-02-18 00:23:17,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 197 SyntacticMatches, 143 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18101 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8632, Invalid=30374, Unknown=0, NotChecked=0, Total=39006 [2023-02-18 00:23:17,003 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 8 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:17,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 616 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:23:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-02-18 00:23:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-02-18 00:23:17,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:17,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2023-02-18 00:23:17,041 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 195 [2023-02-18 00:23:17,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:17,041 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2023-02-18 00:23:17,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.3087248322147653) internal successors, (344), 149 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:17,042 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2023-02-18 00:23:17,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-02-18 00:23:17,042 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:17,042 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:17,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2023-02-18 00:23:17,248 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 00:23:17,248 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash -586834040, now seen corresponding path program 94 times [2023-02-18 00:23:17,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:17,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962918328] [2023-02-18 00:23:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:17,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1128 proven. 3385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:18,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:18,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962918328] [2023-02-18 00:23:18,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962918328] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:18,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308423577] [2023-02-18 00:23:18,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:23:18,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:18,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:18,633 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 00:23:18,635 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 00:23:18,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:23:18,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:18,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 102 conjunts are in the unsatisfiable core [2023-02-18 00:23:18,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:19,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:20,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308423577] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:20,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:20,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 54 [2023-02-18 00:23:20,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91793741] [2023-02-18 00:23:20,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:20,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-18 00:23:20,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-18 00:23:20,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 00:23:20,617 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:21,334 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2023-02-18 00:23:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-02-18 00:23:21,335 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2023-02-18 00:23:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:21,335 INFO L225 Difference]: With dead ends: 208 [2023-02-18 00:23:21,335 INFO L226 Difference]: Without dead ends: 206 [2023-02-18 00:23:21,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 247 SyntacticMatches, 190 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7527 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3933, Invalid=6779, Unknown=0, NotChecked=0, Total=10712 [2023-02-18 00:23:21,336 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 104 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:21,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 37 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:23:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-02-18 00:23:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2023-02-18 00:23:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2023-02-18 00:23:21,374 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 196 [2023-02-18 00:23:21,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:21,374 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2023-02-18 00:23:21,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:21,374 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2023-02-18 00:23:21,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-02-18 00:23:21,375 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:21,375 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:21,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2023-02-18 00:23:21,580 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 00:23:21,580 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:21,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:21,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1851170639, now seen corresponding path program 95 times [2023-02-18 00:23:21,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:21,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506036843] [2023-02-18 00:23:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:21,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3338 proven. 1318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:24,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:24,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506036843] [2023-02-18 00:23:24,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506036843] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:24,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229929305] [2023-02-18 00:23:24,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:23:24,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:24,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:24,130 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 00:23:24,131 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 00:23:24,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2023-02-18 00:23:24,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:24,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 100 conjunts are in the unsatisfiable core [2023-02-18 00:23:24,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:27,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:29,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229929305] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:29,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:29,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 152 [2023-02-18 00:23:29,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518067031] [2023-02-18 00:23:29,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:29,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2023-02-18 00:23:29,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2023-02-18 00:23:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5155, Invalid=17797, Unknown=0, NotChecked=0, Total=22952 [2023-02-18 00:23:29,129 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 152 states, 152 states have (on average 2.3092105263157894) internal successors, (351), 152 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:30,402 INFO L93 Difference]: Finished difference Result 352 states and 354 transitions. [2023-02-18 00:23:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-02-18 00:23:30,402 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.3092105263157894) internal successors, (351), 152 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2023-02-18 00:23:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:30,403 INFO L225 Difference]: With dead ends: 352 [2023-02-18 00:23:30,403 INFO L226 Difference]: Without dead ends: 201 [2023-02-18 00:23:30,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 201 SyntacticMatches, 146 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18846 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=8983, Invalid=31619, Unknown=0, NotChecked=0, Total=40602 [2023-02-18 00:23:30,406 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 8 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:30,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 702 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:23:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-18 00:23:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-02-18 00:23:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2023-02-18 00:23:30,447 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 199 [2023-02-18 00:23:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:30,447 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2023-02-18 00:23:30,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.3092105263157894) internal successors, (351), 152 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2023-02-18 00:23:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-02-18 00:23:30,448 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:30,448 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:30,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2023-02-18 00:23:30,650 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 00:23:30,650 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:30,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:30,650 INFO L85 PathProgramCache]: Analyzing trace with hash -607736084, now seen corresponding path program 96 times [2023-02-18 00:23:30,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:30,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425405818] [2023-02-18 00:23:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:30,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1176 proven. 3529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:32,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:32,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425405818] [2023-02-18 00:23:32,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425405818] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:32,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189935097] [2023-02-18 00:23:32,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:23:32,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:32,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:32,414 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 00:23:32,418 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 00:23:32,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2023-02-18 00:23:32,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:32,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-18 00:23:32,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:34,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:35,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189935097] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:35,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:35,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 55 [2023-02-18 00:23:35,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943727640] [2023-02-18 00:23:35,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:35,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-18 00:23:35,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-18 00:23:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 00:23:35,728 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:36,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:36,345 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2023-02-18 00:23:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-02-18 00:23:36,345 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2023-02-18 00:23:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:36,346 INFO L225 Difference]: With dead ends: 212 [2023-02-18 00:23:36,346 INFO L226 Difference]: Without dead ends: 210 [2023-02-18 00:23:36,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 252 SyntacticMatches, 194 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7831 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4088, Invalid=7042, Unknown=0, NotChecked=0, Total=11130 [2023-02-18 00:23:36,348 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:36,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 31 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:23:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-02-18 00:23:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2023-02-18 00:23:36,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:36,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2023-02-18 00:23:36,387 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 200 [2023-02-18 00:23:36,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:36,388 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2023-02-18 00:23:36,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:36,388 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2023-02-18 00:23:36,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-02-18 00:23:36,388 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:36,389 INFO L195 NwaCegarLoop]: trace histogram [50, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:36,394 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 00:23:36,596 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 00:23:36,597 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:36,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:36,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1773705523, now seen corresponding path program 97 times [2023-02-18 00:23:36,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:36,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970365733] [2023-02-18 00:23:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:36,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3481 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:39,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:39,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970365733] [2023-02-18 00:23:39,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970365733] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:39,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14568985] [2023-02-18 00:23:39,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:23:39,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:39,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:39,111 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 00:23:39,113 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 00:23:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:39,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 102 conjunts are in the unsatisfiable core [2023-02-18 00:23:39,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:41,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:43,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14568985] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:43,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:43,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 155 [2023-02-18 00:23:43,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477584341] [2023-02-18 00:23:43,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:43,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2023-02-18 00:23:43,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:43,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2023-02-18 00:23:43,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5360, Invalid=18510, Unknown=0, NotChecked=0, Total=23870 [2023-02-18 00:23:43,193 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 155 states, 155 states have (on average 2.3096774193548386) internal successors, (358), 155 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:44,447 INFO L93 Difference]: Finished difference Result 359 states and 361 transitions. [2023-02-18 00:23:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-02-18 00:23:44,447 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.3096774193548386) internal successors, (358), 155 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2023-02-18 00:23:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:44,448 INFO L225 Difference]: With dead ends: 359 [2023-02-18 00:23:44,448 INFO L226 Difference]: Without dead ends: 205 [2023-02-18 00:23:44,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 205 SyntacticMatches, 149 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19606 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9341, Invalid=32889, Unknown=0, NotChecked=0, Total=42230 [2023-02-18 00:23:44,451 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 8 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:44,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 644 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:23:44,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-18 00:23:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-02-18 00:23:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2023-02-18 00:23:44,490 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 203 [2023-02-18 00:23:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:44,491 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2023-02-18 00:23:44,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.3096774193548386) internal successors, (358), 155 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2023-02-18 00:23:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-02-18 00:23:44,492 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:44,492 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:44,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2023-02-18 00:23:44,697 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 00:23:44,697 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:44,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:44,697 INFO L85 PathProgramCache]: Analyzing trace with hash -666034296, now seen corresponding path program 98 times [2023-02-18 00:23:44,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:44,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866326108] [2023-02-18 00:23:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:44,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1225 proven. 3676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:46,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:46,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866326108] [2023-02-18 00:23:46,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866326108] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:46,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139845708] [2023-02-18 00:23:46,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:23:46,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:46,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:46,210 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 00:23:46,211 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 00:23:46,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:23:46,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:46,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 106 conjunts are in the unsatisfiable core [2023-02-18 00:23:46,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:47,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:48,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139845708] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:48,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:48,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 56 [2023-02-18 00:23:48,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096756464] [2023-02-18 00:23:48,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:48,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-18 00:23:48,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:48,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-18 00:23:48,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1386, Invalid=1694, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 00:23:48,540 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:49,053 INFO L93 Difference]: Finished difference Result 216 states and 217 transitions. [2023-02-18 00:23:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-02-18 00:23:49,054 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2023-02-18 00:23:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:49,058 INFO L225 Difference]: With dead ends: 216 [2023-02-18 00:23:49,058 INFO L226 Difference]: Without dead ends: 214 [2023-02-18 00:23:49,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 257 SyntacticMatches, 198 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8141 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4246, Invalid=7310, Unknown=0, NotChecked=0, Total=11556 [2023-02-18 00:23:49,059 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 210 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:49,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 27 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:23:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-02-18 00:23:49,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 208. [2023-02-18 00:23:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:49,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2023-02-18 00:23:49,104 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 204 [2023-02-18 00:23:49,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:49,104 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2023-02-18 00:23:49,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:49,105 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2023-02-18 00:23:49,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-02-18 00:23:49,105 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:49,105 INFO L195 NwaCegarLoop]: trace histogram [51, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:49,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2023-02-18 00:23:49,311 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 00:23:49,311 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:49,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:49,312 INFO L85 PathProgramCache]: Analyzing trace with hash 926015665, now seen corresponding path program 99 times [2023-02-18 00:23:49,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:49,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886338659] [2023-02-18 00:23:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:49,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:23:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:23:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3627 proven. 1423 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:52,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:23:52,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886338659] [2023-02-18 00:23:52,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886338659] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:23:52,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399163606] [2023-02-18 00:23:52,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:23:52,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:23:52,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:23:52,880 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 00:23:52,882 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 00:23:53,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2023-02-18 00:23:53,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:23:53,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-18 00:23:53,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:23:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:55,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:23:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:23:58,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399163606] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:23:58,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:23:58,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105] total 158 [2023-02-18 00:23:58,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19971851] [2023-02-18 00:23:58,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:23:58,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2023-02-18 00:23:58,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:23:58,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2023-02-18 00:23:58,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5569, Invalid=19237, Unknown=0, NotChecked=0, Total=24806 [2023-02-18 00:23:58,206 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 158 states, 158 states have (on average 2.310126582278481) internal successors, (365), 158 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:23:59,728 INFO L93 Difference]: Finished difference Result 366 states and 368 transitions. [2023-02-18 00:23:59,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-02-18 00:23:59,728 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.310126582278481) internal successors, (365), 158 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2023-02-18 00:23:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:23:59,729 INFO L225 Difference]: With dead ends: 366 [2023-02-18 00:23:59,729 INFO L226 Difference]: Without dead ends: 209 [2023-02-18 00:23:59,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 209 SyntacticMatches, 152 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20381 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=9706, Invalid=34184, Unknown=0, NotChecked=0, Total=43890 [2023-02-18 00:23:59,731 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 8 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:23:59,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 593 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:23:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-02-18 00:23:59,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-02-18 00:23:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:59,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2023-02-18 00:23:59,775 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 207 [2023-02-18 00:23:59,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:23:59,776 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2023-02-18 00:23:59,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.310126582278481) internal successors, (365), 158 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:23:59,776 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2023-02-18 00:23:59,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-02-18 00:23:59,776 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:23:59,777 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1, 1, 1] [2023-02-18 00:23:59,782 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 00:23:59,982 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 00:23:59,982 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:23:59,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:23:59,982 INFO L85 PathProgramCache]: Analyzing trace with hash 434553836, now seen corresponding path program 100 times [2023-02-18 00:23:59,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:23:59,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506351627] [2023-02-18 00:23:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:23:59,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1275 proven. 3826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:01,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:01,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506351627] [2023-02-18 00:24:01,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506351627] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:01,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724292307] [2023-02-18 00:24:01,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:24:01,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:01,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:01,807 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 00:24:01,808 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 00:24:01,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:24:01,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:01,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 108 conjunts are in the unsatisfiable core [2023-02-18 00:24:01,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1326 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:03,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1326 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:04,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724292307] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:04,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:04,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 57 [2023-02-18 00:24:04,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922039995] [2023-02-18 00:24:04,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:04,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-18 00:24:04,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:04,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-18 00:24:04,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=1753, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 00:24:04,899 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:05,600 INFO L93 Difference]: Finished difference Result 220 states and 221 transitions. [2023-02-18 00:24:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-02-18 00:24:05,600 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2023-02-18 00:24:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:05,601 INFO L225 Difference]: With dead ends: 220 [2023-02-18 00:24:05,601 INFO L226 Difference]: Without dead ends: 218 [2023-02-18 00:24:05,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 262 SyntacticMatches, 202 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8457 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4407, Invalid=7583, Unknown=0, NotChecked=0, Total=11990 [2023-02-18 00:24:05,603 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:05,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 33 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:24:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-18 00:24:05,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2023-02-18 00:24:05,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2023-02-18 00:24:05,647 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 208 [2023-02-18 00:24:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:05,647 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2023-02-18 00:24:05,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2023-02-18 00:24:05,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-02-18 00:24:05,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:05,648 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:05,683 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 00:24:05,852 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 00:24:05,853 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:05,853 INFO L85 PathProgramCache]: Analyzing trace with hash 766718413, now seen corresponding path program 101 times [2023-02-18 00:24:05,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:05,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621253752] [2023-02-18 00:24:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:05,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3776 proven. 1477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:08,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:08,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621253752] [2023-02-18 00:24:08,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621253752] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:08,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965728301] [2023-02-18 00:24:08,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:24:08,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:08,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:08,579 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 00:24:08,581 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 00:24:08,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2023-02-18 00:24:08,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:08,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 106 conjunts are in the unsatisfiable core [2023-02-18 00:24:08,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:11,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:12,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965728301] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:12,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:12,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 161 [2023-02-18 00:24:12,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699084795] [2023-02-18 00:24:12,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:12,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2023-02-18 00:24:12,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:12,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2023-02-18 00:24:12,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5782, Invalid=19978, Unknown=0, NotChecked=0, Total=25760 [2023-02-18 00:24:12,990 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 161 states, 161 states have (on average 2.31055900621118) internal successors, (372), 161 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:14,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:14,383 INFO L93 Difference]: Finished difference Result 373 states and 375 transitions. [2023-02-18 00:24:14,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-02-18 00:24:14,383 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.31055900621118) internal successors, (372), 161 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2023-02-18 00:24:14,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:14,384 INFO L225 Difference]: With dead ends: 373 [2023-02-18 00:24:14,384 INFO L226 Difference]: Without dead ends: 213 [2023-02-18 00:24:14,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 213 SyntacticMatches, 155 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21171 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=10078, Invalid=35504, Unknown=0, NotChecked=0, Total=45582 [2023-02-18 00:24:14,387 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 8 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:14,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 588 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:24:14,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-02-18 00:24:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-02-18 00:24:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2023-02-18 00:24:14,430 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 211 [2023-02-18 00:24:14,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:14,430 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2023-02-18 00:24:14,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.31055900621118) internal successors, (372), 161 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:14,431 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2023-02-18 00:24:14,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-02-18 00:24:14,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:14,432 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:14,437 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 00:24:14,633 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 00:24:14,633 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:14,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:14,633 INFO L85 PathProgramCache]: Analyzing trace with hash 410910600, now seen corresponding path program 102 times [2023-02-18 00:24:14,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:14,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096957161] [2023-02-18 00:24:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:14,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1326 proven. 3979 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:16,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:16,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096957161] [2023-02-18 00:24:16,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096957161] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:16,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169535138] [2023-02-18 00:24:16,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:24:16,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:16,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:16,600 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 00:24:16,602 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 00:24:16,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2023-02-18 00:24:16,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:16,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 110 conjunts are in the unsatisfiable core [2023-02-18 00:24:16,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1378 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:17,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1378 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:18,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169535138] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:18,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:18,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 58 [2023-02-18 00:24:18,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077763317] [2023-02-18 00:24:18,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:18,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-18 00:24:18,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:18,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-18 00:24:18,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1493, Invalid=1813, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 00:24:18,903 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 58 states, 58 states have (on average 3.7241379310344827) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:19,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:19,465 INFO L93 Difference]: Finished difference Result 224 states and 225 transitions. [2023-02-18 00:24:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-02-18 00:24:19,465 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.7241379310344827) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2023-02-18 00:24:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:19,466 INFO L225 Difference]: With dead ends: 224 [2023-02-18 00:24:19,466 INFO L226 Difference]: Without dead ends: 222 [2023-02-18 00:24:19,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 267 SyntacticMatches, 206 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8779 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4571, Invalid=7861, Unknown=0, NotChecked=0, Total=12432 [2023-02-18 00:24:19,468 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 112 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:19,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 37 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:24:19,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-02-18 00:24:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2023-02-18 00:24:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2023-02-18 00:24:19,512 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 212 [2023-02-18 00:24:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:19,512 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2023-02-18 00:24:19,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.7241379310344827) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2023-02-18 00:24:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-02-18 00:24:19,513 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:19,513 INFO L195 NwaCegarLoop]: trace histogram [53, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:19,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2023-02-18 00:24:19,718 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 00:24:19,718 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash 785711281, now seen corresponding path program 103 times [2023-02-18 00:24:19,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:19,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307228675] [2023-02-18 00:24:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:19,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 3928 proven. 1532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:22,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:22,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307228675] [2023-02-18 00:24:22,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307228675] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:22,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64579383] [2023-02-18 00:24:22,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:24:22,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:22,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:22,636 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 00:24:22,638 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 00:24:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:22,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 108 conjunts are in the unsatisfiable core [2023-02-18 00:24:22,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 4082 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:25,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 4082 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:27,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64579383] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:27,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:27,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109, 109] total 164 [2023-02-18 00:24:27,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106165430] [2023-02-18 00:24:27,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:27,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2023-02-18 00:24:27,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:27,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2023-02-18 00:24:27,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5999, Invalid=20733, Unknown=0, NotChecked=0, Total=26732 [2023-02-18 00:24:27,176 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 164 states, 164 states have (on average 2.3109756097560976) internal successors, (379), 164 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:28,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:28,654 INFO L93 Difference]: Finished difference Result 380 states and 382 transitions. [2023-02-18 00:24:28,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-02-18 00:24:28,654 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.3109756097560976) internal successors, (379), 164 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2023-02-18 00:24:28,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:28,654 INFO L225 Difference]: With dead ends: 380 [2023-02-18 00:24:28,654 INFO L226 Difference]: Without dead ends: 217 [2023-02-18 00:24:28,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 217 SyntacticMatches, 158 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21976 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=10457, Invalid=36849, Unknown=0, NotChecked=0, Total=47306 [2023-02-18 00:24:28,656 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 8 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:28,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 668 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:24:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-02-18 00:24:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2023-02-18 00:24:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0092592592592593) internal successors, (218), 216 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:28,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2023-02-18 00:24:28,701 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 215 [2023-02-18 00:24:28,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:28,702 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2023-02-18 00:24:28,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.3109756097560976) internal successors, (379), 164 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2023-02-18 00:24:28,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-02-18 00:24:28,703 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:28,703 INFO L195 NwaCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:28,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2023-02-18 00:24:28,908 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 00:24:28,909 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:28,909 INFO L85 PathProgramCache]: Analyzing trace with hash -138643220, now seen corresponding path program 104 times [2023-02-18 00:24:28,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:28,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242014735] [2023-02-18 00:24:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:28,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1378 proven. 4135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:30,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242014735] [2023-02-18 00:24:30,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242014735] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:30,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309837515] [2023-02-18 00:24:30,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:24:30,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:30,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:30,679 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 00:24:30,680 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 00:24:30,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:24:30,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:30,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 112 conjunts are in the unsatisfiable core [2023-02-18 00:24:30,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1431 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:31,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1431 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:33,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309837515] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:33,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:33,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 59 [2023-02-18 00:24:33,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994564999] [2023-02-18 00:24:33,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:33,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 00:24:33,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:33,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 00:24:33,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1548, Invalid=1874, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 00:24:33,045 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:33,627 INFO L93 Difference]: Finished difference Result 228 states and 229 transitions. [2023-02-18 00:24:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-02-18 00:24:33,627 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2023-02-18 00:24:33,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:33,628 INFO L225 Difference]: With dead ends: 228 [2023-02-18 00:24:33,628 INFO L226 Difference]: Without dead ends: 226 [2023-02-18 00:24:33,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 272 SyntacticMatches, 210 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9107 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4738, Invalid=8144, Unknown=0, NotChecked=0, Total=12882 [2023-02-18 00:24:33,630 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:33,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 38 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:24:33,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-02-18 00:24:33,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 220. [2023-02-18 00:24:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0091324200913243) internal successors, (221), 219 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:33,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2023-02-18 00:24:33,676 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 216 [2023-02-18 00:24:33,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:33,676 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2023-02-18 00:24:33,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:33,676 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2023-02-18 00:24:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-02-18 00:24:33,677 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:33,677 INFO L195 NwaCegarLoop]: trace histogram [54, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:33,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2023-02-18 00:24:33,882 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 00:24:33,883 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:33,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1443192013, now seen corresponding path program 105 times [2023-02-18 00:24:33,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:33,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004285778] [2023-02-18 00:24:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:33,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4083 proven. 1588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:36,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:36,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004285778] [2023-02-18 00:24:36,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004285778] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:36,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520396388] [2023-02-18 00:24:36,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:24:36,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:36,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:36,746 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 00:24:36,748 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 00:24:36,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2023-02-18 00:24:36,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:36,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 110 conjunts are in the unsatisfiable core [2023-02-18 00:24:36,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4240 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:39,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4240 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:41,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520396388] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:41,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:41,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111, 111] total 167 [2023-02-18 00:24:41,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934226346] [2023-02-18 00:24:41,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:41,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2023-02-18 00:24:41,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:41,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2023-02-18 00:24:41,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6220, Invalid=21502, Unknown=0, NotChecked=0, Total=27722 [2023-02-18 00:24:41,642 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 167 states, 167 states have (on average 2.311377245508982) internal successors, (386), 167 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:43,067 INFO L93 Difference]: Finished difference Result 387 states and 389 transitions. [2023-02-18 00:24:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-02-18 00:24:43,067 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.311377245508982) internal successors, (386), 167 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2023-02-18 00:24:43,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:43,068 INFO L225 Difference]: With dead ends: 387 [2023-02-18 00:24:43,068 INFO L226 Difference]: Without dead ends: 221 [2023-02-18 00:24:43,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 221 SyntacticMatches, 161 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22796 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=10843, Invalid=38219, Unknown=0, NotChecked=0, Total=49062 [2023-02-18 00:24:43,071 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 8 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:43,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 654 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:24:43,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-18 00:24:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-02-18 00:24:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2023-02-18 00:24:43,129 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 219 [2023-02-18 00:24:43,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:43,130 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2023-02-18 00:24:43,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.311377245508982) internal successors, (386), 167 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2023-02-18 00:24:43,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-02-18 00:24:43,131 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:43,131 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:43,137 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 00:24:43,337 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 00:24:43,337 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:43,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:43,337 INFO L85 PathProgramCache]: Analyzing trace with hash -240107640, now seen corresponding path program 106 times [2023-02-18 00:24:43,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:43,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437153704] [2023-02-18 00:24:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:43,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1431 proven. 4294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:45,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:45,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437153704] [2023-02-18 00:24:45,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437153704] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:45,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762678009] [2023-02-18 00:24:45,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:24:45,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:45,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:45,110 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 00:24:45,112 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 00:24:45,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:24:45,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:45,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 114 conjunts are in the unsatisfiable core [2023-02-18 00:24:45,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1485 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:46,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1485 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:47,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762678009] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:47,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:47,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 60 [2023-02-18 00:24:47,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837454903] [2023-02-18 00:24:47,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:47,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-18 00:24:47,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:47,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-18 00:24:47,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1604, Invalid=1936, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 00:24:47,520 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:24:48,109 INFO L93 Difference]: Finished difference Result 232 states and 233 transitions. [2023-02-18 00:24:48,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-02-18 00:24:48,109 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2023-02-18 00:24:48,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:24:48,110 INFO L225 Difference]: With dead ends: 232 [2023-02-18 00:24:48,110 INFO L226 Difference]: Without dead ends: 230 [2023-02-18 00:24:48,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 277 SyntacticMatches, 214 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9441 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4908, Invalid=8432, Unknown=0, NotChecked=0, Total=13340 [2023-02-18 00:24:48,111 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 226 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:24:48,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 34 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:24:48,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-02-18 00:24:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 224. [2023-02-18 00:24:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0089686098654709) internal successors, (225), 223 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:48,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2023-02-18 00:24:48,159 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 220 [2023-02-18 00:24:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:24:48,159 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2023-02-18 00:24:48,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:24:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2023-02-18 00:24:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-02-18 00:24:48,160 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:24:48,160 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2023-02-18 00:24:48,168 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 00:24:48,366 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 00:24:48,366 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:24:48,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:24:48,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1921335119, now seen corresponding path program 107 times [2023-02-18 00:24:48,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:24:48,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451836964] [2023-02-18 00:24:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:24:48,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:24:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:24:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4241 proven. 1645 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:51,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:24:51,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451836964] [2023-02-18 00:24:51,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451836964] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:24:51,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114390003] [2023-02-18 00:24:51,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:24:51,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:24:51,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:24:51,371 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 00:24:51,372 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 00:24:51,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2023-02-18 00:24:51,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:24:51,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 112 conjunts are in the unsatisfiable core [2023-02-18 00:24:51,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:24:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4401 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:56,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:24:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4401 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:24:59,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114390003] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:24:59,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:24:59,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113, 113] total 170 [2023-02-18 00:24:59,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176609410] [2023-02-18 00:24:59,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:24:59,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2023-02-18 00:24:59,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:24:59,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2023-02-18 00:24:59,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6445, Invalid=22285, Unknown=0, NotChecked=0, Total=28730 [2023-02-18 00:24:59,028 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand has 170 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 170 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:00,709 INFO L93 Difference]: Finished difference Result 394 states and 396 transitions. [2023-02-18 00:25:00,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-02-18 00:25:00,709 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 170 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2023-02-18 00:25:00,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:00,710 INFO L225 Difference]: With dead ends: 394 [2023-02-18 00:25:00,710 INFO L226 Difference]: Without dead ends: 225 [2023-02-18 00:25:00,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 225 SyntacticMatches, 164 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23631 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=11236, Invalid=39614, Unknown=0, NotChecked=0, Total=50850 [2023-02-18 00:25:00,712 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 8 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:00,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 797 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:25:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-02-18 00:25:00,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2023-02-18 00:25:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:00,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2023-02-18 00:25:00,760 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 223 [2023-02-18 00:25:00,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:00,760 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2023-02-18 00:25:00,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 170 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2023-02-18 00:25:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-02-18 00:25:00,761 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:00,761 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:00,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2023-02-18 00:25:00,967 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 00:25:00,967 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:00,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:00,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1087386132, now seen corresponding path program 108 times [2023-02-18 00:25:00,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:00,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581935153] [2023-02-18 00:25:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:00,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1485 proven. 4456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:03,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:25:03,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581935153] [2023-02-18 00:25:03,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581935153] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:25:03,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323749357] [2023-02-18 00:25:03,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:25:03,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:03,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:25:03,035 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 00:25:03,035 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 00:25:03,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2023-02-18 00:25:03,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:25:03,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 116 conjunts are in the unsatisfiable core [2023-02-18 00:25:03,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:25:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1540 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:04,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:25:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1540 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:05,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323749357] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:25:05,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:25:05,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 61 [2023-02-18 00:25:05,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121284129] [2023-02-18 00:25:05,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:25:05,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-18 00:25:05,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:25:05,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-18 00:25:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1661, Invalid=1999, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 00:25:05,717 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:06,329 INFO L93 Difference]: Finished difference Result 236 states and 237 transitions. [2023-02-18 00:25:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-02-18 00:25:06,329 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2023-02-18 00:25:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:06,330 INFO L225 Difference]: With dead ends: 236 [2023-02-18 00:25:06,330 INFO L226 Difference]: Without dead ends: 234 [2023-02-18 00:25:06,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 282 SyntacticMatches, 218 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9781 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5081, Invalid=8725, Unknown=0, NotChecked=0, Total=13806 [2023-02-18 00:25:06,332 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 120 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:06,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 37 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:25:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-02-18 00:25:06,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2023-02-18 00:25:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.0088105726872247) internal successors, (229), 227 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2023-02-18 00:25:06,381 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 224 [2023-02-18 00:25:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:06,381 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2023-02-18 00:25:06,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2023-02-18 00:25:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-02-18 00:25:06,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:06,382 INFO L195 NwaCegarLoop]: trace histogram [56, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:06,390 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 00:25:06,588 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 00:25:06,588 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:06,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1672091699, now seen corresponding path program 109 times [2023-02-18 00:25:06,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:06,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580064370] [2023-02-18 00:25:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:06,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4402 proven. 1703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:09,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:25:09,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580064370] [2023-02-18 00:25:09,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580064370] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:25:09,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412832205] [2023-02-18 00:25:09,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:25:09,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:09,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:25:09,865 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 00:25:09,867 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 00:25:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:09,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 114 conjunts are in the unsatisfiable core [2023-02-18 00:25:09,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:25:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4565 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:14,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:25:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4565 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:17,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412832205] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:25:17,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:25:17,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115, 115] total 173 [2023-02-18 00:25:17,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793254146] [2023-02-18 00:25:17,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:25:17,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2023-02-18 00:25:17,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:25:17,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2023-02-18 00:25:17,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6674, Invalid=23082, Unknown=0, NotChecked=0, Total=29756 [2023-02-18 00:25:17,572 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand has 173 states, 173 states have (on average 2.3121387283236996) internal successors, (400), 173 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:19,240 INFO L93 Difference]: Finished difference Result 401 states and 403 transitions. [2023-02-18 00:25:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-02-18 00:25:19,240 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.3121387283236996) internal successors, (400), 173 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2023-02-18 00:25:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:19,241 INFO L225 Difference]: With dead ends: 401 [2023-02-18 00:25:19,241 INFO L226 Difference]: Without dead ends: 229 [2023-02-18 00:25:19,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 229 SyntacticMatches, 167 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24481 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=11636, Invalid=41034, Unknown=0, NotChecked=0, Total=52670 [2023-02-18 00:25:19,269 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 8 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:19,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 734 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:25:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-02-18 00:25:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2023-02-18 00:25:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 228 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2023-02-18 00:25:19,324 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 227 [2023-02-18 00:25:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:19,324 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2023-02-18 00:25:19,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 2.3121387283236996) internal successors, (400), 173 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2023-02-18 00:25:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-02-18 00:25:19,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:19,325 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:19,330 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 00:25:19,529 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 00:25:19,529 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:19,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1510219896, now seen corresponding path program 110 times [2023-02-18 00:25:19,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:19,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950296687] [2023-02-18 00:25:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:19,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1540 proven. 4621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:21,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:25:21,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950296687] [2023-02-18 00:25:21,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950296687] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:25:21,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111909555] [2023-02-18 00:25:21,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:25:21,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:21,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:25:21,482 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 00:25:21,482 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 00:25:21,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:25:21,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:25:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 118 conjunts are in the unsatisfiable core [2023-02-18 00:25:21,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:25:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1596 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:22,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:25:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1596 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:24,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111909555] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:25:24,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:25:24,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 62 [2023-02-18 00:25:24,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957022457] [2023-02-18 00:25:24,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:25:24,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-18 00:25:24,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:25:24,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-18 00:25:24,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1719, Invalid=2063, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 00:25:24,133 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:24,762 INFO L93 Difference]: Finished difference Result 240 states and 241 transitions. [2023-02-18 00:25:24,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-02-18 00:25:24,762 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2023-02-18 00:25:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:24,763 INFO L225 Difference]: With dead ends: 240 [2023-02-18 00:25:24,763 INFO L226 Difference]: Without dead ends: 238 [2023-02-18 00:25:24,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 287 SyntacticMatches, 222 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10127 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5257, Invalid=9023, Unknown=0, NotChecked=0, Total=14280 [2023-02-18 00:25:24,765 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 232 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:24,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 23 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:25:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-02-18 00:25:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 232. [2023-02-18 00:25:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0086580086580086) internal successors, (233), 231 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2023-02-18 00:25:24,816 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 228 [2023-02-18 00:25:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:24,816 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2023-02-18 00:25:24,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2023-02-18 00:25:24,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-02-18 00:25:24,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:24,817 INFO L195 NwaCegarLoop]: trace histogram [57, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:24,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2023-02-18 00:25:25,023 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 00:25:25,023 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1173675855, now seen corresponding path program 111 times [2023-02-18 00:25:25,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:25,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901513678] [2023-02-18 00:25:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:25,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4566 proven. 1762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:28,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:25:28,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901513678] [2023-02-18 00:25:28,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901513678] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:25:28,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711627907] [2023-02-18 00:25:28,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:25:28,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:28,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:25:28,251 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 00:25:28,252 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 00:25:28,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2023-02-18 00:25:28,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:25:28,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 116 conjunts are in the unsatisfiable core [2023-02-18 00:25:28,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:25:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4732 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:31,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:25:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4732 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:33,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711627907] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:25:33,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:25:33,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 176 [2023-02-18 00:25:33,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376708742] [2023-02-18 00:25:33,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:25:33,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2023-02-18 00:25:33,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:25:33,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2023-02-18 00:25:33,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6907, Invalid=23893, Unknown=0, NotChecked=0, Total=30800 [2023-02-18 00:25:33,467 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand has 176 states, 176 states have (on average 2.3125) internal successors, (407), 176 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:35,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:35,131 INFO L93 Difference]: Finished difference Result 408 states and 410 transitions. [2023-02-18 00:25:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-02-18 00:25:35,132 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.3125) internal successors, (407), 176 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2023-02-18 00:25:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:35,132 INFO L225 Difference]: With dead ends: 408 [2023-02-18 00:25:35,133 INFO L226 Difference]: Without dead ends: 233 [2023-02-18 00:25:35,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 233 SyntacticMatches, 170 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25346 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=12043, Invalid=42479, Unknown=0, NotChecked=0, Total=54522 [2023-02-18 00:25:35,136 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 8 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:35,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 832 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:25:35,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-18 00:25:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2023-02-18 00:25:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0086206896551724) internal successors, (234), 232 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2023-02-18 00:25:35,188 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 231 [2023-02-18 00:25:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:35,188 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2023-02-18 00:25:35,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.3125) internal successors, (407), 176 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2023-02-18 00:25:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2023-02-18 00:25:35,189 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:35,189 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:35,194 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 00:25:35,394 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 00:25:35,395 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash 203997932, now seen corresponding path program 112 times [2023-02-18 00:25:35,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:35,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18733582] [2023-02-18 00:25:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:35,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1596 proven. 4789 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:37,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:25:37,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18733582] [2023-02-18 00:25:37,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18733582] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:25:37,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53711392] [2023-02-18 00:25:37,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:25:37,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:37,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:25:37,482 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 00:25:37,484 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 00:25:37,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:25:37,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:25:37,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 120 conjunts are in the unsatisfiable core [2023-02-18 00:25:37,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:25:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1653 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:38,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:25:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1653 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:40,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53711392] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:25:40,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:25:40,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 63 [2023-02-18 00:25:40,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156676634] [2023-02-18 00:25:40,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:25:40,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-18 00:25:40,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:25:40,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-18 00:25:40,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=2128, Unknown=0, NotChecked=0, Total=3906 [2023-02-18 00:25:40,313 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand has 63 states, 63 states have (on average 3.746031746031746) internal successors, (236), 63 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:41,013 INFO L93 Difference]: Finished difference Result 244 states and 245 transitions. [2023-02-18 00:25:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-02-18 00:25:41,013 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.746031746031746) internal successors, (236), 63 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2023-02-18 00:25:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:41,014 INFO L225 Difference]: With dead ends: 244 [2023-02-18 00:25:41,014 INFO L226 Difference]: Without dead ends: 242 [2023-02-18 00:25:41,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 292 SyntacticMatches, 226 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10479 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5436, Invalid=9326, Unknown=0, NotChecked=0, Total=14762 [2023-02-18 00:25:41,016 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 122 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:41,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 38 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:25:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-02-18 00:25:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 236. [2023-02-18 00:25:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.0085106382978724) internal successors, (237), 235 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2023-02-18 00:25:41,069 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 232 [2023-02-18 00:25:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:41,069 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2023-02-18 00:25:41,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.746031746031746) internal successors, (236), 63 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2023-02-18 00:25:41,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-02-18 00:25:41,070 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:41,070 INFO L195 NwaCegarLoop]: trace histogram [58, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:41,080 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 00:25:41,275 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 00:25:41,276 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash -71511347, now seen corresponding path program 113 times [2023-02-18 00:25:41,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:41,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136006732] [2023-02-18 00:25:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:41,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4733 proven. 1822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:44,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:25:44,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136006732] [2023-02-18 00:25:44,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136006732] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:25:44,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877064759] [2023-02-18 00:25:44,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:25:44,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:44,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:25:44,626 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 00:25:44,628 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 00:25:44,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2023-02-18 00:25:44,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:25:44,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 118 conjunts are in the unsatisfiable core [2023-02-18 00:25:44,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:25:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4902 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:48,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:25:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4902 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:50,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877064759] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:25:50,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:25:50,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119, 119] total 179 [2023-02-18 00:25:50,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491533981] [2023-02-18 00:25:50,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:25:50,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2023-02-18 00:25:50,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:25:50,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2023-02-18 00:25:50,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7144, Invalid=24718, Unknown=0, NotChecked=0, Total=31862 [2023-02-18 00:25:50,564 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand has 179 states, 179 states have (on average 2.3128491620111733) internal successors, (414), 179 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:52,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:52,281 INFO L93 Difference]: Finished difference Result 415 states and 417 transitions. [2023-02-18 00:25:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-02-18 00:25:52,281 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 2.3128491620111733) internal successors, (414), 179 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2023-02-18 00:25:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:52,282 INFO L225 Difference]: With dead ends: 415 [2023-02-18 00:25:52,282 INFO L226 Difference]: Without dead ends: 237 [2023-02-18 00:25:52,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 237 SyntacticMatches, 173 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26226 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=12457, Invalid=43949, Unknown=0, NotChecked=0, Total=56406 [2023-02-18 00:25:52,286 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 8 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:52,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 816 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:25:52,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-02-18 00:25:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2023-02-18 00:25:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2023-02-18 00:25:52,351 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 235 [2023-02-18 00:25:52,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:52,351 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2023-02-18 00:25:52,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 2.3128491620111733) internal successors, (414), 179 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:52,352 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2023-02-18 00:25:52,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-02-18 00:25:52,352 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:52,352 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:52,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2023-02-18 00:25:52,558 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 00:25:52,558 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:52,559 INFO L85 PathProgramCache]: Analyzing trace with hash -445063288, now seen corresponding path program 114 times [2023-02-18 00:25:52,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:52,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136881131] [2023-02-18 00:25:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:52,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:25:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1653 proven. 4960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:54,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:25:54,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136881131] [2023-02-18 00:25:54,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136881131] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:25:54,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320307642] [2023-02-18 00:25:54,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:25:54,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:25:54,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:25:54,887 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 00:25:54,888 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 00:25:55,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2023-02-18 00:25:55,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:25:55,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 122 conjunts are in the unsatisfiable core [2023-02-18 00:25:55,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:25:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1711 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:56,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:25:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1711 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:25:57,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320307642] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:25:57,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:25:57,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 64 [2023-02-18 00:25:57,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786368241] [2023-02-18 00:25:57,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:25:57,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-18 00:25:57,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:25:57,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-18 00:25:57,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1838, Invalid=2194, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 00:25:57,705 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand has 64 states, 64 states have (on average 3.75) internal successors, (240), 64 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:58,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:25:58,528 INFO L93 Difference]: Finished difference Result 248 states and 249 transitions. [2023-02-18 00:25:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-02-18 00:25:58,529 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.75) internal successors, (240), 64 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2023-02-18 00:25:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:25:58,529 INFO L225 Difference]: With dead ends: 248 [2023-02-18 00:25:58,530 INFO L226 Difference]: Without dead ends: 246 [2023-02-18 00:25:58,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 297 SyntacticMatches, 230 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10837 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5618, Invalid=9634, Unknown=0, NotChecked=0, Total=15252 [2023-02-18 00:25:58,531 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 240 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:25:58,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 32 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:25:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-18 00:25:58,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 240. [2023-02-18 00:25:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.00836820083682) internal successors, (241), 239 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2023-02-18 00:25:58,586 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 236 [2023-02-18 00:25:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:25:58,586 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2023-02-18 00:25:58,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.75) internal successors, (240), 64 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:25:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2023-02-18 00:25:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-02-18 00:25:58,587 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:25:58,587 INFO L195 NwaCegarLoop]: trace histogram [59, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2023-02-18 00:25:58,595 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 00:25:58,793 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 00:25:58,794 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:25:58,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:25:58,794 INFO L85 PathProgramCache]: Analyzing trace with hash -311549775, now seen corresponding path program 115 times [2023-02-18 00:25:58,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:25:58,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806559707] [2023-02-18 00:25:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:25:58,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:25:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 4903 proven. 1883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:03,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:03,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806559707] [2023-02-18 00:26:03,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806559707] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:03,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260732641] [2023-02-18 00:26:03,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:26:03,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:03,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:03,053 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 00:26:03,054 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 00:26:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:03,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 120 conjunts are in the unsatisfiable core [2023-02-18 00:26:03,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 5075 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:07,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:26:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 5075 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:10,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260732641] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:26:10,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:26:10,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121, 121] total 182 [2023-02-18 00:26:10,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368951252] [2023-02-18 00:26:10,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:26:10,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2023-02-18 00:26:10,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:26:10,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2023-02-18 00:26:10,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7385, Invalid=25557, Unknown=0, NotChecked=0, Total=32942 [2023-02-18 00:26:10,969 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand has 182 states, 182 states have (on average 2.3131868131868134) internal successors, (421), 182 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:13,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:26:13,238 INFO L93 Difference]: Finished difference Result 422 states and 424 transitions. [2023-02-18 00:26:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-02-18 00:26:13,238 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.3131868131868134) internal successors, (421), 182 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2023-02-18 00:26:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:26:13,239 INFO L225 Difference]: With dead ends: 422 [2023-02-18 00:26:13,239 INFO L226 Difference]: Without dead ends: 241 [2023-02-18 00:26:13,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 241 SyntacticMatches, 176 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27121 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=12878, Invalid=45444, Unknown=0, NotChecked=0, Total=58322 [2023-02-18 00:26:13,247 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 8 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:26:13,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 674 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:26:13,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-02-18 00:26:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2023-02-18 00:26:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0083333333333333) internal successors, (242), 240 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2023-02-18 00:26:13,303 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 239 [2023-02-18 00:26:13,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:26:13,303 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2023-02-18 00:26:13,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.3131868131868134) internal successors, (421), 182 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2023-02-18 00:26:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-02-18 00:26:13,304 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:26:13,304 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1, 1, 1] [2023-02-18 00:26:13,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2023-02-18 00:26:13,509 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 00:26:13,509 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:26:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:26:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1284462572, now seen corresponding path program 116 times [2023-02-18 00:26:13,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:26:13,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663916450] [2023-02-18 00:26:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:26:13,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:26:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1711 proven. 5134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:16,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:16,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663916450] [2023-02-18 00:26:16,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663916450] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:16,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907284130] [2023-02-18 00:26:16,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:26:16,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:16,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:16,106 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 00:26:16,108 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 00:26:16,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:26:16,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:26:16,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 124 conjunts are in the unsatisfiable core [2023-02-18 00:26:16,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1770 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:18,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:26:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1770 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:20,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907284130] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:26:20,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:26:20,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 65 [2023-02-18 00:26:20,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980636084] [2023-02-18 00:26:20,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:26:20,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-18 00:26:20,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:26:20,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-18 00:26:20,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1899, Invalid=2261, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 00:26:20,571 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:21,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:26:21,445 INFO L93 Difference]: Finished difference Result 252 states and 253 transitions. [2023-02-18 00:26:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-02-18 00:26:21,445 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2023-02-18 00:26:21,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:26:21,446 INFO L225 Difference]: With dead ends: 252 [2023-02-18 00:26:21,447 INFO L226 Difference]: Without dead ends: 250 [2023-02-18 00:26:21,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 302 SyntacticMatches, 234 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11201 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5803, Invalid=9947, Unknown=0, NotChecked=0, Total=15750 [2023-02-18 00:26:21,448 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 246 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:26:21,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 35 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:26:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-02-18 00:26:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 244. [2023-02-18 00:26:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.008230452674897) internal successors, (245), 243 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:21,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2023-02-18 00:26:21,537 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 240 [2023-02-18 00:26:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:26:21,538 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2023-02-18 00:26:21,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2023-02-18 00:26:21,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-02-18 00:26:21,539 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:26:21,539 INFO L195 NwaCegarLoop]: trace histogram [60, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2023-02-18 00:26:21,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2023-02-18 00:26:21,744 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 00:26:21,744 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:26:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:26:21,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1565662669, now seen corresponding path program 117 times [2023-02-18 00:26:21,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:26:21,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205335256] [2023-02-18 00:26:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:26:21,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:26:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5076 proven. 1945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:25,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:25,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205335256] [2023-02-18 00:26:25,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205335256] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:25,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021487670] [2023-02-18 00:26:25,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:26:25,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:25,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:25,428 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 00:26:25,429 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 00:26:25,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2023-02-18 00:26:25,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:26:25,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 122 conjunts are in the unsatisfiable core [2023-02-18 00:26:25,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5251 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:29,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:26:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5251 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:31,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021487670] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:26:31,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:26:31,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123, 123] total 185 [2023-02-18 00:26:31,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511761477] [2023-02-18 00:26:31,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:26:31,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2023-02-18 00:26:31,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:26:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2023-02-18 00:26:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7630, Invalid=26410, Unknown=0, NotChecked=0, Total=34040 [2023-02-18 00:26:31,203 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand has 185 states, 185 states have (on average 2.3135135135135134) internal successors, (428), 185 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:33,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:26:33,185 INFO L93 Difference]: Finished difference Result 429 states and 431 transitions. [2023-02-18 00:26:33,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-02-18 00:26:33,185 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 2.3135135135135134) internal successors, (428), 185 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2023-02-18 00:26:33,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:26:33,186 INFO L225 Difference]: With dead ends: 429 [2023-02-18 00:26:33,186 INFO L226 Difference]: Without dead ends: 245 [2023-02-18 00:26:33,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 245 SyntacticMatches, 179 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28031 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=13306, Invalid=46964, Unknown=0, NotChecked=0, Total=60270 [2023-02-18 00:26:33,190 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 8 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:26:33,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 807 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:26:33,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-02-18 00:26:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2023-02-18 00:26:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2023-02-18 00:26:33,248 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 243 [2023-02-18 00:26:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:26:33,248 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2023-02-18 00:26:33,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 2.3135135135135134) internal successors, (428), 185 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:33,248 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2023-02-18 00:26:33,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-02-18 00:26:33,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:26:33,249 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1, 1, 1] [2023-02-18 00:26:33,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2023-02-18 00:26:33,455 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 00:26:33,455 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:26:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:26:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1312767880, now seen corresponding path program 118 times [2023-02-18 00:26:33,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:26:33,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480865248] [2023-02-18 00:26:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:26:33,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:26:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1770 proven. 5311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:36,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:36,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480865248] [2023-02-18 00:26:36,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480865248] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:36,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388684298] [2023-02-18 00:26:36,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:26:36,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:36,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:36,039 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 00:26:36,041 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 00:26:36,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:26:36,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:26:36,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 126 conjunts are in the unsatisfiable core [2023-02-18 00:26:36,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1830 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:38,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:26:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1830 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:39,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388684298] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:26:39,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:26:39,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 66 [2023-02-18 00:26:39,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362982951] [2023-02-18 00:26:39,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:26:39,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-18 00:26:39,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:26:39,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-18 00:26:39,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=2329, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 00:26:39,867 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 66 states, 66 states have (on average 3.757575757575758) internal successors, (248), 66 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:26:40,748 INFO L93 Difference]: Finished difference Result 256 states and 257 transitions. [2023-02-18 00:26:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2023-02-18 00:26:40,749 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.757575757575758) internal successors, (248), 66 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2023-02-18 00:26:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:26:40,749 INFO L225 Difference]: With dead ends: 256 [2023-02-18 00:26:40,749 INFO L226 Difference]: Without dead ends: 254 [2023-02-18 00:26:40,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 307 SyntacticMatches, 238 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11571 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5991, Invalid=10265, Unknown=0, NotChecked=0, Total=16256 [2023-02-18 00:26:40,750 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 130 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:26:40,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 36 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:26:40,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-02-18 00:26:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2023-02-18 00:26:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.008097165991903) internal successors, (249), 247 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 249 transitions. [2023-02-18 00:26:40,809 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 249 transitions. Word has length 244 [2023-02-18 00:26:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:26:40,809 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 249 transitions. [2023-02-18 00:26:40,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.757575757575758) internal successors, (248), 66 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 249 transitions. [2023-02-18 00:26:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-02-18 00:26:40,810 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:26:40,810 INFO L195 NwaCegarLoop]: trace histogram [61, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2023-02-18 00:26:40,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2023-02-18 00:26:41,016 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 00:26:41,017 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:26:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:26:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1299464015, now seen corresponding path program 119 times [2023-02-18 00:26:41,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:26:41,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552568438] [2023-02-18 00:26:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:26:41,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:26:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5252 proven. 2008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:45,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:45,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552568438] [2023-02-18 00:26:45,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552568438] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:45,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733866129] [2023-02-18 00:26:45,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:26:45,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:45,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:45,159 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 00:26:45,159 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 00:26:45,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2023-02-18 00:26:45,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:26:45,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 124 conjunts are in the unsatisfiable core [2023-02-18 00:26:45,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5430 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:48,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:26:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5430 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:51,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733866129] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:26:51,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:26:51,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125, 125] total 188 [2023-02-18 00:26:51,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043448932] [2023-02-18 00:26:51,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:26:51,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2023-02-18 00:26:51,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:26:51,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2023-02-18 00:26:51,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7879, Invalid=27277, Unknown=0, NotChecked=0, Total=35156 [2023-02-18 00:26:51,087 INFO L87 Difference]: Start difference. First operand 248 states and 249 transitions. Second operand has 188 states, 188 states have (on average 2.3138297872340425) internal successors, (435), 188 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:26:52,897 INFO L93 Difference]: Finished difference Result 436 states and 438 transitions. [2023-02-18 00:26:52,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-02-18 00:26:52,897 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 2.3138297872340425) internal successors, (435), 188 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2023-02-18 00:26:52,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:26:52,898 INFO L225 Difference]: With dead ends: 436 [2023-02-18 00:26:52,898 INFO L226 Difference]: Without dead ends: 249 [2023-02-18 00:26:52,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 249 SyntacticMatches, 182 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28956 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=13741, Invalid=48509, Unknown=0, NotChecked=0, Total=62250 [2023-02-18 00:26:52,902 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 8 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:26:52,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 679 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:26:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-02-18 00:26:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2023-02-18 00:26:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:52,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2023-02-18 00:26:52,975 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 247 [2023-02-18 00:26:52,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:26:52,976 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2023-02-18 00:26:52,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 2.3138297872340425) internal successors, (435), 188 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:26:52,976 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2023-02-18 00:26:52,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-02-18 00:26:52,977 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:26:52,977 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1, 1, 1] [2023-02-18 00:26:52,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2023-02-18 00:26:53,183 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 00:26:53,183 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:26:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:26:53,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1078693100, now seen corresponding path program 120 times [2023-02-18 00:26:53,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:26:53,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248171686] [2023-02-18 00:26:53,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:26:53,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:26:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:26:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1830 proven. 5491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:55,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:26:55,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248171686] [2023-02-18 00:26:55,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248171686] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:26:55,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444474540] [2023-02-18 00:26:55,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:26:55,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:26:55,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:26:55,612 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 00:26:55,613 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 00:26:55,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2023-02-18 00:26:55,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:26:55,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 128 conjunts are in the unsatisfiable core [2023-02-18 00:26:55,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:26:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1891 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:26:58,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:27:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1891 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:00,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444474540] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:27:00,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:27:00,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 67 [2023-02-18 00:27:00,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690102479] [2023-02-18 00:27:00,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:27:00,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-18 00:27:00,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:27:00,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-18 00:27:00,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=2398, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 00:27:00,060 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 67 states, 67 states have (on average 3.7611940298507465) internal successors, (252), 67 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:27:00,842 INFO L93 Difference]: Finished difference Result 260 states and 261 transitions. [2023-02-18 00:27:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2023-02-18 00:27:00,842 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.7611940298507465) internal successors, (252), 67 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2023-02-18 00:27:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:27:00,843 INFO L225 Difference]: With dead ends: 260 [2023-02-18 00:27:00,843 INFO L226 Difference]: Without dead ends: 258 [2023-02-18 00:27:00,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 312 SyntacticMatches, 242 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11947 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6182, Invalid=10588, Unknown=0, NotChecked=0, Total=16770 [2023-02-18 00:27:00,844 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 130 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:27:00,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 31 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:27:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-02-18 00:27:00,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2023-02-18 00:27:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0079681274900398) internal successors, (253), 251 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2023-02-18 00:27:00,905 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 248 [2023-02-18 00:27:00,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:27:00,905 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2023-02-18 00:27:00,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.7611940298507465) internal successors, (252), 67 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:00,905 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2023-02-18 00:27:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-02-18 00:27:00,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:27:00,906 INFO L195 NwaCegarLoop]: trace histogram [62, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2023-02-18 00:27:00,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2023-02-18 00:27:01,112 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 00:27:01,112 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:27:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:27:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash 405653709, now seen corresponding path program 121 times [2023-02-18 00:27:01,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:27:01,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596817647] [2023-02-18 00:27:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:27:01,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:27:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5431 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:04,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:27:04,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596817647] [2023-02-18 00:27:04,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596817647] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:27:04,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451731346] [2023-02-18 00:27:04,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:27:04,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:04,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:27:04,943 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 00:27:04,944 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 00:27:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:05,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 126 conjunts are in the unsatisfiable core [2023-02-18 00:27:05,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:27:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5612 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:08,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:27:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5612 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:10,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451731346] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:27:10,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:27:10,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127, 127] total 191 [2023-02-18 00:27:10,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016839199] [2023-02-18 00:27:10,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:27:10,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2023-02-18 00:27:10,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:27:10,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2023-02-18 00:27:10,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8132, Invalid=28158, Unknown=0, NotChecked=0, Total=36290 [2023-02-18 00:27:10,989 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand has 191 states, 191 states have (on average 2.3141361256544504) internal successors, (442), 191 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:27:13,005 INFO L93 Difference]: Finished difference Result 443 states and 445 transitions. [2023-02-18 00:27:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2023-02-18 00:27:13,005 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 2.3141361256544504) internal successors, (442), 191 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2023-02-18 00:27:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:27:13,006 INFO L225 Difference]: With dead ends: 443 [2023-02-18 00:27:13,006 INFO L226 Difference]: Without dead ends: 253 [2023-02-18 00:27:13,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 253 SyntacticMatches, 185 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29896 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=14183, Invalid=50079, Unknown=0, NotChecked=0, Total=64262 [2023-02-18 00:27:13,010 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 8 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:27:13,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1022 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2023 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:27:13,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-02-18 00:27:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2023-02-18 00:27:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.007936507936508) internal successors, (254), 252 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2023-02-18 00:27:13,072 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 251 [2023-02-18 00:27:13,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:27:13,072 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2023-02-18 00:27:13,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 2.3141361256544504) internal successors, (442), 191 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:13,072 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2023-02-18 00:27:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-02-18 00:27:13,073 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:27:13,073 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1, 1, 1] [2023-02-18 00:27:13,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2023-02-18 00:27:13,279 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 00:27:13,279 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:27:13,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:27:13,279 INFO L85 PathProgramCache]: Analyzing trace with hash -328794232, now seen corresponding path program 122 times [2023-02-18 00:27:13,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:27:13,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395076905] [2023-02-18 00:27:13,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:27:13,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:27:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1891 proven. 5674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:15,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:27:15,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395076905] [2023-02-18 00:27:15,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395076905] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:27:15,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015729623] [2023-02-18 00:27:15,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:27:15,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:15,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:27:15,723 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 00:27:15,724 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 00:27:15,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:27:15,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:27:15,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 130 conjunts are in the unsatisfiable core [2023-02-18 00:27:15,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:27:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1953 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:17,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:27:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1953 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:18,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015729623] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:27:18,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:27:18,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 68 [2023-02-18 00:27:18,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554845857] [2023-02-18 00:27:18,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:27:18,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-18 00:27:18,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:27:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-18 00:27:18,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2088, Invalid=2468, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 00:27:18,918 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand has 68 states, 68 states have (on average 3.764705882352941) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:19,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:27:19,669 INFO L93 Difference]: Finished difference Result 264 states and 265 transitions. [2023-02-18 00:27:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2023-02-18 00:27:19,670 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.764705882352941) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2023-02-18 00:27:19,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:27:19,670 INFO L225 Difference]: With dead ends: 264 [2023-02-18 00:27:19,670 INFO L226 Difference]: Without dead ends: 262 [2023-02-18 00:27:19,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 317 SyntacticMatches, 246 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12329 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6376, Invalid=10916, Unknown=0, NotChecked=0, Total=17292 [2023-02-18 00:27:19,672 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 132 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:27:19,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 31 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:27:19,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-02-18 00:27:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 256. [2023-02-18 00:27:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.007843137254902) internal successors, (257), 255 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2023-02-18 00:27:19,734 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 252 [2023-02-18 00:27:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:27:19,734 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2023-02-18 00:27:19,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.764705882352941) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:19,734 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2023-02-18 00:27:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-02-18 00:27:19,735 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:27:19,735 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2023-02-18 00:27:19,743 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 00:27:19,941 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 00:27:19,941 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:27:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:27:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1716256945, now seen corresponding path program 123 times [2023-02-18 00:27:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:27:19,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754792494] [2023-02-18 00:27:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:27:19,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:27:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5613 proven. 2137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:23,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:27:23,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754792494] [2023-02-18 00:27:23,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754792494] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:27:23,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438010333] [2023-02-18 00:27:23,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:27:23,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:23,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:27:23,957 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 00:27:23,958 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 00:27:24,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2023-02-18 00:27:24,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:27:24,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 128 conjunts are in the unsatisfiable core [2023-02-18 00:27:24,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:27:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5797 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:28,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:27:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5797 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:31,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438010333] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:27:31,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:27:31,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 194 [2023-02-18 00:27:31,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400746084] [2023-02-18 00:27:31,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:27:31,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-02-18 00:27:31,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:27:31,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-02-18 00:27:31,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8389, Invalid=29053, Unknown=0, NotChecked=0, Total=37442 [2023-02-18 00:27:31,053 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand has 194 states, 194 states have (on average 2.314432989690722) internal successors, (449), 194 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:33,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:27:33,188 INFO L93 Difference]: Finished difference Result 450 states and 452 transitions. [2023-02-18 00:27:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2023-02-18 00:27:33,188 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.314432989690722) internal successors, (449), 194 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2023-02-18 00:27:33,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:27:33,189 INFO L225 Difference]: With dead ends: 450 [2023-02-18 00:27:33,189 INFO L226 Difference]: Without dead ends: 257 [2023-02-18 00:27:33,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 257 SyntacticMatches, 188 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30851 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=14632, Invalid=51674, Unknown=0, NotChecked=0, Total=66306 [2023-02-18 00:27:33,191 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 8 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 1807 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:27:33,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 916 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1807 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:27:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-02-18 00:27:33,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2023-02-18 00:27:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.0078125) internal successors, (258), 256 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:33,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2023-02-18 00:27:33,253 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 255 [2023-02-18 00:27:33,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:27:33,254 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2023-02-18 00:27:33,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.314432989690722) internal successors, (449), 194 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:33,254 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2023-02-18 00:27:33,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-02-18 00:27:33,255 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:27:33,255 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1, 1, 1] [2023-02-18 00:27:33,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2023-02-18 00:27:33,460 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 00:27:33,460 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:27:33,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:27:33,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2034590188, now seen corresponding path program 124 times [2023-02-18 00:27:33,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:27:33,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244044597] [2023-02-18 00:27:33,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:27:33,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:27:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 1953 proven. 5860 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:36,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:27:36,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244044597] [2023-02-18 00:27:36,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244044597] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:27:36,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780225778] [2023-02-18 00:27:36,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:27:36,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:36,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:27:36,490 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 00:27:36,491 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 00:27:36,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:27:36,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:27:36,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 132 conjunts are in the unsatisfiable core [2023-02-18 00:27:36,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:27:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 2016 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:38,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:27:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 2016 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:40,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780225778] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:27:40,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:27:40,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 69 [2023-02-18 00:27:40,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816504574] [2023-02-18 00:27:40,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:27:40,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-18 00:27:40,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:27:40,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-18 00:27:40,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2153, Invalid=2539, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 00:27:40,423 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand has 69 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 69 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:41,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:27:41,244 INFO L93 Difference]: Finished difference Result 268 states and 269 transitions. [2023-02-18 00:27:41,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-02-18 00:27:41,245 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 69 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 256 [2023-02-18 00:27:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:27:41,245 INFO L225 Difference]: With dead ends: 268 [2023-02-18 00:27:41,245 INFO L226 Difference]: Without dead ends: 266 [2023-02-18 00:27:41,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 322 SyntacticMatches, 250 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12717 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=6573, Invalid=11249, Unknown=0, NotChecked=0, Total=17822 [2023-02-18 00:27:41,246 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 262 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:27:41,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 28 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:27:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-02-18 00:27:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 260. [2023-02-18 00:27:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.0077220077220077) internal successors, (261), 259 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 261 transitions. [2023-02-18 00:27:41,310 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 261 transitions. Word has length 256 [2023-02-18 00:27:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:27:41,310 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 261 transitions. [2023-02-18 00:27:41,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 69 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 261 transitions. [2023-02-18 00:27:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-02-18 00:27:41,312 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:27:41,312 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2023-02-18 00:27:41,317 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 00:27:41,517 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 00:27:41,517 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:27:41,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:27:41,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1902629837, now seen corresponding path program 125 times [2023-02-18 00:27:41,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:27:41,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847324835] [2023-02-18 00:27:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:27:41,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:27:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5798 proven. 2203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:45,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:27:45,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847324835] [2023-02-18 00:27:45,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847324835] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:27:45,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276206006] [2023-02-18 00:27:45,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:27:45,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:45,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:27:45,876 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 00:27:45,877 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 00:27:46,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2023-02-18 00:27:46,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:27:46,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 130 conjunts are in the unsatisfiable core [2023-02-18 00:27:46,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:27:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5985 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:50,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:27:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5985 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:53,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276206006] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:27:53,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:27:53,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 197 [2023-02-18 00:27:53,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272435729] [2023-02-18 00:27:53,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:27:53,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2023-02-18 00:27:53,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:27:53,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2023-02-18 00:27:53,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8650, Invalid=29962, Unknown=0, NotChecked=0, Total=38612 [2023-02-18 00:27:53,224 INFO L87 Difference]: Start difference. First operand 260 states and 261 transitions. Second operand has 197 states, 197 states have (on average 2.314720812182741) internal successors, (456), 197 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:27:55,285 INFO L93 Difference]: Finished difference Result 457 states and 459 transitions. [2023-02-18 00:27:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2023-02-18 00:27:55,285 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 2.314720812182741) internal successors, (456), 197 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2023-02-18 00:27:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:27:55,286 INFO L225 Difference]: With dead ends: 457 [2023-02-18 00:27:55,286 INFO L226 Difference]: Without dead ends: 261 [2023-02-18 00:27:55,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 261 SyntacticMatches, 191 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31821 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=15088, Invalid=53294, Unknown=0, NotChecked=0, Total=68382 [2023-02-18 00:27:55,290 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 8 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:27:55,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 865 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:27:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-02-18 00:27:55,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2023-02-18 00:27:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0076923076923077) internal successors, (262), 260 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:55,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2023-02-18 00:27:55,355 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 259 [2023-02-18 00:27:55,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:27:55,355 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2023-02-18 00:27:55,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 2.314720812182741) internal successors, (456), 197 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:27:55,356 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2023-02-18 00:27:55,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-02-18 00:27:55,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:27:55,357 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1, 1, 1] [2023-02-18 00:27:55,362 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 00:27:55,562 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 00:27:55,563 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:27:55,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:27:55,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1173872760, now seen corresponding path program 126 times [2023-02-18 00:27:55,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:27:55,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734473369] [2023-02-18 00:27:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:27:55,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:27:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:27:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2016 proven. 6049 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:27:58,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:27:58,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734473369] [2023-02-18 00:27:58,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734473369] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:27:58,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330640594] [2023-02-18 00:27:58,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:27:58,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:27:58,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:27:58,722 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 00:27:58,723 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 00:27:58,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2023-02-18 00:27:58,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:27:58,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 134 conjunts are in the unsatisfiable core [2023-02-18 00:27:58,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:28:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2080 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:00,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:28:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2080 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:02,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330640594] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:28:02,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:28:02,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 70 [2023-02-18 00:28:02,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515225186] [2023-02-18 00:28:02,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:28:02,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-02-18 00:28:02,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:28:02,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-02-18 00:28:02,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2219, Invalid=2611, Unknown=0, NotChecked=0, Total=4830 [2023-02-18 00:28:02,478 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand has 70 states, 70 states have (on average 3.7714285714285714) internal successors, (264), 70 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:28:03,269 INFO L93 Difference]: Finished difference Result 272 states and 273 transitions. [2023-02-18 00:28:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2023-02-18 00:28:03,270 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.7714285714285714) internal successors, (264), 70 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2023-02-18 00:28:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:28:03,271 INFO L225 Difference]: With dead ends: 272 [2023-02-18 00:28:03,271 INFO L226 Difference]: Without dead ends: 270 [2023-02-18 00:28:03,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 327 SyntacticMatches, 254 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13111 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6773, Invalid=11587, Unknown=0, NotChecked=0, Total=18360 [2023-02-18 00:28:03,274 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 266 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:28:03,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 47 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:28:03,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-02-18 00:28:03,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2023-02-18 00:28:03,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0076045627376427) internal successors, (265), 263 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 265 transitions. [2023-02-18 00:28:03,346 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 265 transitions. Word has length 260 [2023-02-18 00:28:03,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:28:03,347 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 265 transitions. [2023-02-18 00:28:03,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.7714285714285714) internal successors, (264), 70 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:03,347 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 265 transitions. [2023-02-18 00:28:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-02-18 00:28:03,348 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:28:03,348 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2023-02-18 00:28:03,354 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 00:28:03,554 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 00:28:03,554 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:28:03,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:28:03,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1214848847, now seen corresponding path program 127 times [2023-02-18 00:28:03,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:28:03,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327941619] [2023-02-18 00:28:03,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:28:03,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:28:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:28:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 5986 proven. 2270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:08,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:28:08,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327941619] [2023-02-18 00:28:08,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327941619] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:28:08,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839926836] [2023-02-18 00:28:08,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:28:08,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:28:08,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:28:08,965 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 00:28:08,966 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 00:28:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:28:09,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 132 conjunts are in the unsatisfiable core [2023-02-18 00:28:09,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:28:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 6176 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:13,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:28:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 6176 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:15,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839926836] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:28:15,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:28:15,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133, 133] total 200 [2023-02-18 00:28:15,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189408233] [2023-02-18 00:28:15,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:28:15,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2023-02-18 00:28:15,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:28:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2023-02-18 00:28:15,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8915, Invalid=30885, Unknown=0, NotChecked=0, Total=39800 [2023-02-18 00:28:15,602 INFO L87 Difference]: Start difference. First operand 264 states and 265 transitions. Second operand has 200 states, 200 states have (on average 2.315) internal successors, (463), 200 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:28:17,871 INFO L93 Difference]: Finished difference Result 464 states and 466 transitions. [2023-02-18 00:28:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-02-18 00:28:17,871 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.315) internal successors, (463), 200 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2023-02-18 00:28:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:28:17,872 INFO L225 Difference]: With dead ends: 464 [2023-02-18 00:28:17,872 INFO L226 Difference]: Without dead ends: 265 [2023-02-18 00:28:17,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 265 SyntacticMatches, 194 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32806 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=15551, Invalid=54939, Unknown=0, NotChecked=0, Total=70490 [2023-02-18 00:28:17,877 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 8 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 2225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:28:17,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1130 Invalid, 2225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 00:28:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-02-18 00:28:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2023-02-18 00:28:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2023-02-18 00:28:17,944 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 263 [2023-02-18 00:28:17,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:28:17,944 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2023-02-18 00:28:17,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.315) internal successors, (463), 200 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:17,945 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2023-02-18 00:28:17,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-02-18 00:28:17,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:28:17,945 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1, 1, 1] [2023-02-18 00:28:17,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2023-02-18 00:28:18,152 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 00:28:18,152 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:28:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:28:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash -614148372, now seen corresponding path program 128 times [2023-02-18 00:28:18,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:28:18,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421392330] [2023-02-18 00:28:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:28:18,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:28:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:28:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2080 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:20,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:28:20,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421392330] [2023-02-18 00:28:20,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421392330] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:28:20,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343355284] [2023-02-18 00:28:20,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:28:20,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:28:20,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:28:20,905 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 00:28:20,906 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 00:28:21,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:28:21,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:28:21,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 136 conjunts are in the unsatisfiable core [2023-02-18 00:28:21,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:28:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2145 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:22,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:28:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2145 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:24,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343355284] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:28:24,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:28:24,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 71 [2023-02-18 00:28:24,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897827791] [2023-02-18 00:28:24,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:28:24,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-18 00:28:24,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:28:24,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-18 00:28:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2286, Invalid=2684, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 00:28:24,360 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 71 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 71 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:28:25,194 INFO L93 Difference]: Finished difference Result 276 states and 277 transitions. [2023-02-18 00:28:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2023-02-18 00:28:25,194 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 71 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2023-02-18 00:28:25,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:28:25,195 INFO L225 Difference]: With dead ends: 276 [2023-02-18 00:28:25,195 INFO L226 Difference]: Without dead ends: 274 [2023-02-18 00:28:25,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 332 SyntacticMatches, 258 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13511 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6976, Invalid=11930, Unknown=0, NotChecked=0, Total=18906 [2023-02-18 00:28:25,196 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 268 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:28:25,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 36 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:28:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-02-18 00:28:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 268. [2023-02-18 00:28:25,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.0074906367041199) internal successors, (269), 267 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 269 transitions. [2023-02-18 00:28:25,264 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 269 transitions. Word has length 264 [2023-02-18 00:28:25,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:28:25,265 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 269 transitions. [2023-02-18 00:28:25,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 71 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 269 transitions. [2023-02-18 00:28:25,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-02-18 00:28:25,265 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:28:25,266 INFO L195 NwaCegarLoop]: trace histogram [66, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2023-02-18 00:28:25,271 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 00:28:25,471 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 00:28:25,471 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:28:25,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:28:25,471 INFO L85 PathProgramCache]: Analyzing trace with hash 471350989, now seen corresponding path program 129 times [2023-02-18 00:28:25,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:28:25,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990308815] [2023-02-18 00:28:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:28:25,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:28:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:28:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6177 proven. 2338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:31,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:28:31,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990308815] [2023-02-18 00:28:31,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990308815] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:28:31,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751484659] [2023-02-18 00:28:31,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:28:31,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:28:31,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:28:31,398 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 00:28:31,400 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 00:28:31,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2023-02-18 00:28:31,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:28:31,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 134 conjunts are in the unsatisfiable core [2023-02-18 00:28:31,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:28:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6370 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:37,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:28:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6370 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:42,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751484659] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:28:42,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:28:42,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135, 135] total 203 [2023-02-18 00:28:42,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622582702] [2023-02-18 00:28:42,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:28:42,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-02-18 00:28:42,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:28:42,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-02-18 00:28:42,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9184, Invalid=31822, Unknown=0, NotChecked=0, Total=41006 [2023-02-18 00:28:42,014 INFO L87 Difference]: Start difference. First operand 268 states and 269 transitions. Second operand has 203 states, 203 states have (on average 2.315270935960591) internal successors, (470), 203 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:44,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:28:44,382 INFO L93 Difference]: Finished difference Result 471 states and 473 transitions. [2023-02-18 00:28:44,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2023-02-18 00:28:44,383 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.315270935960591) internal successors, (470), 203 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2023-02-18 00:28:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:28:44,383 INFO L225 Difference]: With dead ends: 471 [2023-02-18 00:28:44,383 INFO L226 Difference]: Without dead ends: 269 [2023-02-18 00:28:44,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 269 SyntacticMatches, 197 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33806 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=16021, Invalid=56609, Unknown=0, NotChecked=0, Total=72630 [2023-02-18 00:28:44,386 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 8 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:28:44,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 848 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:28:44,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-02-18 00:28:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2023-02-18 00:28:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.007462686567164) internal successors, (270), 268 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2023-02-18 00:28:44,455 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 267 [2023-02-18 00:28:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:28:44,455 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2023-02-18 00:28:44,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.315270935960591) internal successors, (470), 203 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2023-02-18 00:28:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-02-18 00:28:44,456 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:28:44,456 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1, 1, 1] [2023-02-18 00:28:44,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2023-02-18 00:28:44,661 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 00:28:44,662 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:28:44,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:28:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash 523935624, now seen corresponding path program 130 times [2023-02-18 00:28:44,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:28:44,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360532926] [2023-02-18 00:28:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:28:44,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:28:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:28:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2145 proven. 6436 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:47,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:28:47,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360532926] [2023-02-18 00:28:47,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360532926] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:28:47,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393302372] [2023-02-18 00:28:47,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:28:47,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:28:47,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:28:47,598 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 00:28:47,600 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 00:28:47,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:28:47,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:28:47,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 138 conjunts are in the unsatisfiable core [2023-02-18 00:28:47,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:28:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2211 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:49,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:28:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2211 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:51,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393302372] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:28:51,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:28:51,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 72 [2023-02-18 00:28:51,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460949784] [2023-02-18 00:28:51,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:28:51,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-02-18 00:28:51,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:28:51,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-02-18 00:28:51,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2354, Invalid=2758, Unknown=0, NotChecked=0, Total=5112 [2023-02-18 00:28:51,157 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand has 72 states, 72 states have (on average 3.7777777777777777) internal successors, (272), 72 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call 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 L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:28:52,159 INFO L93 Difference]: Finished difference Result 280 states and 281 transitions. [2023-02-18 00:28:52,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-02-18 00:28:52,160 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.7777777777777777) internal successors, (272), 72 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2023-02-18 00:28:52,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:28:52,160 INFO L225 Difference]: With dead ends: 280 [2023-02-18 00:28:52,160 INFO L226 Difference]: Without dead ends: 278 [2023-02-18 00:28:52,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 337 SyntacticMatches, 262 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13917 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=7182, Invalid=12278, Unknown=0, NotChecked=0, Total=19460 [2023-02-18 00:28:52,162 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 274 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:28:52,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 29 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:28:52,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-02-18 00:28:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 272. [2023-02-18 00:28:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.007380073800738) internal successors, (273), 271 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 273 transitions. [2023-02-18 00:28:52,233 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 273 transitions. Word has length 268 [2023-02-18 00:28:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:28:52,233 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 273 transitions. [2023-02-18 00:28:52,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.7777777777777777) internal successors, (272), 72 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:28:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 273 transitions. [2023-02-18 00:28:52,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-02-18 00:28:52,234 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:28:52,234 INFO L195 NwaCegarLoop]: trace histogram [67, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2023-02-18 00:28:52,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2023-02-18 00:28:52,439 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 00:28:52,440 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:28:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:28:52,440 INFO L85 PathProgramCache]: Analyzing trace with hash 659841201, now seen corresponding path program 131 times [2023-02-18 00:28:52,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:28:52,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18353762] [2023-02-18 00:28:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:28:52,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:28:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:28:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6371 proven. 2407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:28:58,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:28:58,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18353762] [2023-02-18 00:28:58,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18353762] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:28:58,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634659075] [2023-02-18 00:28:58,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:28:58,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:28:58,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:28:58,602 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 00:28:58,603 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 00:28:58,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2023-02-18 00:28:58,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:28:58,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 136 conjunts are in the unsatisfiable core [2023-02-18 00:28:58,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:29:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6567 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:05,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:29:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6567 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:08,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634659075] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:29:08,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:29:08,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137, 137] total 206 [2023-02-18 00:29:08,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571009545] [2023-02-18 00:29:08,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:29:08,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2023-02-18 00:29:08,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:29:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2023-02-18 00:29:08,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9457, Invalid=32773, Unknown=0, NotChecked=0, Total=42230 [2023-02-18 00:29:08,561 INFO L87 Difference]: Start difference. First operand 272 states and 273 transitions. Second operand has 206 states, 206 states have (on average 2.3155339805825244) internal successors, (477), 206 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:29:10,995 INFO L93 Difference]: Finished difference Result 478 states and 480 transitions. [2023-02-18 00:29:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2023-02-18 00:29:10,995 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.3155339805825244) internal successors, (477), 206 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2023-02-18 00:29:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:29:10,996 INFO L225 Difference]: With dead ends: 478 [2023-02-18 00:29:10,996 INFO L226 Difference]: Without dead ends: 273 [2023-02-18 00:29:10,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 273 SyntacticMatches, 200 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34821 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=16498, Invalid=58304, Unknown=0, NotChecked=0, Total=74802 [2023-02-18 00:29:10,999 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 8 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:29:10,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 982 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1947 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 00:29:10,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-02-18 00:29:11,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2023-02-18 00:29:11,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.0073529411764706) internal successors, (274), 272 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 274 transitions. [2023-02-18 00:29:11,070 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 274 transitions. Word has length 271 [2023-02-18 00:29:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:29:11,070 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 274 transitions. [2023-02-18 00:29:11,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.3155339805825244) internal successors, (477), 206 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 274 transitions. [2023-02-18 00:29:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-02-18 00:29:11,071 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:29:11,071 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1, 1, 1, 1, 1] [2023-02-18 00:29:11,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2023-02-18 00:29:11,273 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 00:29:11,273 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:29:11,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:29:11,273 INFO L85 PathProgramCache]: Analyzing trace with hash 479325164, now seen corresponding path program 132 times [2023-02-18 00:29:11,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:29:11,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173657338] [2023-02-18 00:29:11,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:11,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:29:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 2211 proven. 6634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:14,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:29:14,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173657338] [2023-02-18 00:29:14,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173657338] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:29:14,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996977739] [2023-02-18 00:29:14,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:29:14,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:29:14,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:29:14,382 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 00:29:14,383 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 00:29:14,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2023-02-18 00:29:14,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:29:14,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 140 conjunts are in the unsatisfiable core [2023-02-18 00:29:14,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:29:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 2278 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:16,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:29:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 2278 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:18,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996977739] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:29:18,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:29:18,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 73 [2023-02-18 00:29:18,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419965935] [2023-02-18 00:29:18,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:29:18,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-02-18 00:29:18,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:29:18,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-02-18 00:29:18,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=2833, Unknown=0, NotChecked=0, Total=5256 [2023-02-18 00:29:18,201 INFO L87 Difference]: Start difference. First operand 273 states and 274 transitions. Second operand has 73 states, 73 states have (on average 3.780821917808219) internal successors, (276), 73 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:19,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:29:19,543 INFO L93 Difference]: Finished difference Result 284 states and 285 transitions. [2023-02-18 00:29:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2023-02-18 00:29:19,543 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.780821917808219) internal successors, (276), 73 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2023-02-18 00:29:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:29:19,544 INFO L225 Difference]: With dead ends: 284 [2023-02-18 00:29:19,544 INFO L226 Difference]: Without dead ends: 282 [2023-02-18 00:29:19,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 342 SyntacticMatches, 266 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14329 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7391, Invalid=12631, Unknown=0, NotChecked=0, Total=20022 [2023-02-18 00:29:19,544 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 276 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:29:19,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 33 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:29:19,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-02-18 00:29:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 276. [2023-02-18 00:29:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.0072727272727273) internal successors, (277), 275 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2023-02-18 00:29:19,617 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 272 [2023-02-18 00:29:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:29:19,617 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2023-02-18 00:29:19,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.780821917808219) internal successors, (276), 73 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2023-02-18 00:29:19,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-02-18 00:29:19,618 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:29:19,618 INFO L195 NwaCegarLoop]: trace histogram [68, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2023-02-18 00:29:19,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2023-02-18 00:29:19,824 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 00:29:19,824 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:29:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:29:19,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1185478195, now seen corresponding path program 133 times [2023-02-18 00:29:19,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:29:19,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321356903] [2023-02-18 00:29:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:19,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:29:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 6568 proven. 2477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:26,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:29:26,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321356903] [2023-02-18 00:29:26,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321356903] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:29:26,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665913652] [2023-02-18 00:29:26,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:29:26,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:29:26,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:29:26,145 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 00:29:26,147 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 00:29:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:26,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 138 conjunts are in the unsatisfiable core [2023-02-18 00:29:26,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:29:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 6767 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:31,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:29:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 6767 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:34,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665913652] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:29:34,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:29:34,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 209 [2023-02-18 00:29:34,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120043097] [2023-02-18 00:29:34,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:29:34,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 209 states [2023-02-18 00:29:34,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:29:34,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2023-02-18 00:29:34,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9734, Invalid=33738, Unknown=0, NotChecked=0, Total=43472 [2023-02-18 00:29:34,502 INFO L87 Difference]: Start difference. First operand 276 states and 277 transitions. Second operand has 209 states, 209 states have (on average 2.3157894736842106) internal successors, (484), 209 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:29:36,715 INFO L93 Difference]: Finished difference Result 485 states and 487 transitions. [2023-02-18 00:29:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-02-18 00:29:36,715 INFO L78 Accepts]: Start accepts. Automaton has has 209 states, 209 states have (on average 2.3157894736842106) internal successors, (484), 209 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 275 [2023-02-18 00:29:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:29:36,716 INFO L225 Difference]: With dead ends: 485 [2023-02-18 00:29:36,716 INFO L226 Difference]: Without dead ends: 277 [2023-02-18 00:29:36,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 277 SyntacticMatches, 203 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35851 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=16982, Invalid=60024, Unknown=0, NotChecked=0, Total=77006 [2023-02-18 00:29:36,720 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 8 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:29:36,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 768 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:29:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-02-18 00:29:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2023-02-18 00:29:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.0072463768115942) internal successors, (278), 276 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2023-02-18 00:29:36,793 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 275 [2023-02-18 00:29:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:29:36,793 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2023-02-18 00:29:36,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 209 states, 209 states have (on average 2.3157894736842106) internal successors, (484), 209 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2023-02-18 00:29:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-02-18 00:29:36,794 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:29:36,794 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1, 1, 1] [2023-02-18 00:29:36,802 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 00:29:37,000 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 00:29:37,000 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:29:37,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:29:37,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1914077064, now seen corresponding path program 134 times [2023-02-18 00:29:37,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:29:37,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671030420] [2023-02-18 00:29:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:37,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:29:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9113 backedges. 2278 proven. 6835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:40,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:29:40,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671030420] [2023-02-18 00:29:40,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671030420] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:29:40,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16048459] [2023-02-18 00:29:40,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:29:40,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:29:40,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:29:40,004 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 00:29:40,005 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 00:29:40,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:29:40,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:29:40,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 142 conjunts are in the unsatisfiable core [2023-02-18 00:29:40,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:29:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9113 backedges. 2346 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:41,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:29:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9113 backedges. 2346 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:43,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16048459] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:29:43,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:29:43,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 74 [2023-02-18 00:29:43,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982824636] [2023-02-18 00:29:43,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:29:43,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-18 00:29:43,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:29:43,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-18 00:29:43,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2493, Invalid=2909, Unknown=0, NotChecked=0, Total=5402 [2023-02-18 00:29:43,769 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand has 74 states, 74 states have (on average 3.7837837837837838) internal successors, (280), 74 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:29:44,679 INFO L93 Difference]: Finished difference Result 288 states and 289 transitions. [2023-02-18 00:29:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-18 00:29:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.7837837837837838) internal successors, (280), 74 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 276 [2023-02-18 00:29:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:29:44,680 INFO L225 Difference]: With dead ends: 288 [2023-02-18 00:29:44,680 INFO L226 Difference]: Without dead ends: 286 [2023-02-18 00:29:44,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 347 SyntacticMatches, 270 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14747 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=7603, Invalid=12989, Unknown=0, NotChecked=0, Total=20592 [2023-02-18 00:29:44,682 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 282 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:29:44,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 40 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:29:44,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-02-18 00:29:44,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 280. [2023-02-18 00:29:44,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.007168458781362) internal successors, (281), 279 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:44,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2023-02-18 00:29:44,757 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 276 [2023-02-18 00:29:44,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:29:44,757 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2023-02-18 00:29:44,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.7837837837837838) internal successors, (280), 74 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:29:44,757 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2023-02-18 00:29:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-02-18 00:29:44,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:29:44,758 INFO L195 NwaCegarLoop]: trace histogram [69, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2023-02-18 00:29:44,764 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 00:29:44,963 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 00:29:44,964 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:29:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:29:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2006155087, now seen corresponding path program 135 times [2023-02-18 00:29:44,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:29:44,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768008629] [2023-02-18 00:29:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:29:44,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:29:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:29:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 6768 proven. 2548 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:49,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:29:49,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768008629] [2023-02-18 00:29:49,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768008629] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:29:49,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818005623] [2023-02-18 00:29:49,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:29:49,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:29:49,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:29:49,865 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 00:29:49,867 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 00:29:50,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2023-02-18 00:29:50,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:29:50,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 140 conjunts are in the unsatisfiable core [2023-02-18 00:29:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:29:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 6970 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:55,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:29:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 6970 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:29:58,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818005623] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:29:58,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:29:58,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141, 141] total 212 [2023-02-18 00:29:58,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048706171] [2023-02-18 00:29:58,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:29:58,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2023-02-18 00:29:58,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:29:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2023-02-18 00:29:58,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10015, Invalid=34717, Unknown=0, NotChecked=0, Total=44732 [2023-02-18 00:29:58,269 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand has 212 states, 212 states have (on average 2.3160377358490565) internal successors, (491), 212 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:00,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:00,623 INFO L93 Difference]: Finished difference Result 492 states and 494 transitions. [2023-02-18 00:30:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2023-02-18 00:30:00,623 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.3160377358490565) internal successors, (491), 212 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 279 [2023-02-18 00:30:00,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:00,624 INFO L225 Difference]: With dead ends: 492 [2023-02-18 00:30:00,624 INFO L226 Difference]: Without dead ends: 281 [2023-02-18 00:30:00,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 281 SyntacticMatches, 206 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36896 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=17473, Invalid=61769, Unknown=0, NotChecked=0, Total=79242 [2023-02-18 00:30:00,627 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 8 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:00,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1005 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:30:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-18 00:30:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2023-02-18 00:30:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.0071428571428571) internal successors, (282), 280 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2023-02-18 00:30:00,703 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 279 [2023-02-18 00:30:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:00,703 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2023-02-18 00:30:00,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.3160377358490565) internal successors, (491), 212 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2023-02-18 00:30:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-02-18 00:30:00,704 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:00,704 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:00,710 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 00:30:00,910 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 00:30:00,911 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:00,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:00,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1152688364, now seen corresponding path program 136 times [2023-02-18 00:30:00,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:00,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187094130] [2023-02-18 00:30:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:00,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9385 backedges. 2346 proven. 7039 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:04,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:04,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187094130] [2023-02-18 00:30:04,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187094130] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:04,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037681344] [2023-02-18 00:30:04,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:30:04,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:04,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:04,040 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 00:30:04,041 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 00:30:04,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:30:04,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:04,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 144 conjunts are in the unsatisfiable core [2023-02-18 00:30:04,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9385 backedges. 2415 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:06,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9385 backedges. 2415 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:07,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037681344] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:07,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:07,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 75 [2023-02-18 00:30:07,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903672986] [2023-02-18 00:30:07,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:07,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-02-18 00:30:07,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:07,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-02-18 00:30:07,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2564, Invalid=2986, Unknown=0, NotChecked=0, Total=5550 [2023-02-18 00:30:07,986 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand has 75 states, 75 states have (on average 3.7866666666666666) internal successors, (284), 75 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:08,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:08,899 INFO L93 Difference]: Finished difference Result 292 states and 293 transitions. [2023-02-18 00:30:08,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2023-02-18 00:30:08,900 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.7866666666666666) internal successors, (284), 75 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2023-02-18 00:30:08,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:08,901 INFO L225 Difference]: With dead ends: 292 [2023-02-18 00:30:08,901 INFO L226 Difference]: Without dead ends: 290 [2023-02-18 00:30:08,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 352 SyntacticMatches, 274 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15171 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7818, Invalid=13352, Unknown=0, NotChecked=0, Total=21170 [2023-02-18 00:30:08,903 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 148 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:08,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 38 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:30:08,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-02-18 00:30:08,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 284. [2023-02-18 00:30:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.0070671378091873) internal successors, (285), 283 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:08,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 285 transitions. [2023-02-18 00:30:08,980 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 285 transitions. Word has length 280 [2023-02-18 00:30:08,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:08,980 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 285 transitions. [2023-02-18 00:30:08,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.7866666666666666) internal successors, (284), 75 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:08,981 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 285 transitions. [2023-02-18 00:30:08,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2023-02-18 00:30:08,981 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:08,981 INFO L195 NwaCegarLoop]: trace histogram [70, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:08,988 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 00:30:09,188 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 00:30:09,188 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:09,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:09,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1480340685, now seen corresponding path program 137 times [2023-02-18 00:30:09,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:09,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514251808] [2023-02-18 00:30:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:09,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 6971 proven. 2620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:14,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:14,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514251808] [2023-02-18 00:30:14,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514251808] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:14,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695341825] [2023-02-18 00:30:14,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:30:14,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:14,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:14,251 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 00:30:14,252 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 00:30:14,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2023-02-18 00:30:14,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:14,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 142 conjunts are in the unsatisfiable core [2023-02-18 00:30:14,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 7176 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:19,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 7176 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:24,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695341825] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:24,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:24,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143, 143] total 215 [2023-02-18 00:30:24,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834591534] [2023-02-18 00:30:24,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:24,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 215 states [2023-02-18 00:30:24,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:24,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2023-02-18 00:30:24,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10300, Invalid=35710, Unknown=0, NotChecked=0, Total=46010 [2023-02-18 00:30:24,641 INFO L87 Difference]: Start difference. First operand 284 states and 285 transitions. Second operand has 215 states, 215 states have (on average 2.316279069767442) internal successors, (498), 215 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:27,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:27,515 INFO L93 Difference]: Finished difference Result 499 states and 501 transitions. [2023-02-18 00:30:27,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-18 00:30:27,515 INFO L78 Accepts]: Start accepts. Automaton has has 215 states, 215 states have (on average 2.316279069767442) internal successors, (498), 215 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 283 [2023-02-18 00:30:27,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:27,515 INFO L225 Difference]: With dead ends: 499 [2023-02-18 00:30:27,516 INFO L226 Difference]: Without dead ends: 285 [2023-02-18 00:30:27,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 285 SyntacticMatches, 209 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37956 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=17971, Invalid=63539, Unknown=0, NotChecked=0, Total=81510 [2023-02-18 00:30:27,520 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 8 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:27,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 725 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 00:30:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-02-18 00:30:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2023-02-18 00:30:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0070422535211268) internal successors, (286), 284 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2023-02-18 00:30:27,597 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 283 [2023-02-18 00:30:27,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:27,597 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2023-02-18 00:30:27,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 215 states, 215 states have (on average 2.316279069767442) internal successors, (498), 215 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2023-02-18 00:30:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2023-02-18 00:30:27,598 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:27,598 INFO L195 NwaCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:27,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:27,804 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 00:30:27,805 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1991491464, now seen corresponding path program 138 times [2023-02-18 00:30:27,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:27,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917353995] [2023-02-18 00:30:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:27,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9661 backedges. 2415 proven. 7246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:31,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917353995] [2023-02-18 00:30:31,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917353995] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777238546] [2023-02-18 00:30:31,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:30:31,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:31,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:31,242 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 00:30:31,243 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 00:30:31,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2023-02-18 00:30:31,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:31,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 146 conjunts are in the unsatisfiable core [2023-02-18 00:30:31,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9661 backedges. 2485 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:33,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9661 backedges. 2485 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:35,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777238546] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:35,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:35,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 76 [2023-02-18 00:30:35,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066885855] [2023-02-18 00:30:35,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:35,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-18 00:30:35,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:35,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-18 00:30:35,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2636, Invalid=3064, Unknown=0, NotChecked=0, Total=5700 [2023-02-18 00:30:35,324 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand has 76 states, 76 states have (on average 3.789473684210526) internal successors, (288), 76 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:36,251 INFO L93 Difference]: Finished difference Result 296 states and 297 transitions. [2023-02-18 00:30:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2023-02-18 00:30:36,251 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.789473684210526) internal successors, (288), 76 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 284 [2023-02-18 00:30:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:36,252 INFO L225 Difference]: With dead ends: 296 [2023-02-18 00:30:36,252 INFO L226 Difference]: Without dead ends: 294 [2023-02-18 00:30:36,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 357 SyntacticMatches, 278 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15601 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8036, Invalid=13720, Unknown=0, NotChecked=0, Total=21756 [2023-02-18 00:30:36,253 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 290 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:36,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 37 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:30:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-02-18 00:30:36,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 288. [2023-02-18 00:30:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.0069686411149825) internal successors, (289), 287 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 289 transitions. [2023-02-18 00:30:36,332 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 289 transitions. Word has length 284 [2023-02-18 00:30:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:36,332 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 289 transitions. [2023-02-18 00:30:36,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.789473684210526) internal successors, (288), 76 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 289 transitions. [2023-02-18 00:30:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-02-18 00:30:36,333 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:36,333 INFO L195 NwaCegarLoop]: trace histogram [71, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:36,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:36,540 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 00:30:36,540 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:36,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2143764657, now seen corresponding path program 139 times [2023-02-18 00:30:36,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:36,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603951282] [2023-02-18 00:30:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:36,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 7177 proven. 2693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:41,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:41,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603951282] [2023-02-18 00:30:41,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603951282] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:41,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643395727] [2023-02-18 00:30:41,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:30:41,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:41,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:41,869 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 00:30:41,870 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 00:30:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:42,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 144 conjunts are in the unsatisfiable core [2023-02-18 00:30:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 7385 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:48,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 7385 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:52,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643395727] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:52,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:52,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145, 145] total 218 [2023-02-18 00:30:52,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171490009] [2023-02-18 00:30:52,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:52,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2023-02-18 00:30:52,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:52,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2023-02-18 00:30:52,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10589, Invalid=36717, Unknown=0, NotChecked=0, Total=47306 [2023-02-18 00:30:52,969 INFO L87 Difference]: Start difference. First operand 288 states and 289 transitions. Second operand has 218 states, 218 states have (on average 2.31651376146789) internal successors, (505), 218 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:56,351 INFO L93 Difference]: Finished difference Result 506 states and 508 transitions. [2023-02-18 00:30:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2023-02-18 00:30:56,352 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 2.31651376146789) internal successors, (505), 218 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2023-02-18 00:30:56,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:56,352 INFO L225 Difference]: With dead ends: 506 [2023-02-18 00:30:56,352 INFO L226 Difference]: Without dead ends: 289 [2023-02-18 00:30:56,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 289 SyntacticMatches, 212 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39031 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=18476, Invalid=65334, Unknown=0, NotChecked=0, Total=83810 [2023-02-18 00:30:56,355 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 8 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:56,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 973 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 00:30:56,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-02-18 00:30:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-02-18 00:30:56,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.0069444444444444) internal successors, (290), 288 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2023-02-18 00:30:56,435 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 287 [2023-02-18 00:30:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:56,435 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2023-02-18 00:30:56,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 2.31651376146789) internal successors, (505), 218 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2023-02-18 00:30:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2023-02-18 00:30:56,436 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:56,436 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:56,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:56,642 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 00:30:56,643 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:56,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:56,643 INFO L85 PathProgramCache]: Analyzing trace with hash 766834156, now seen corresponding path program 140 times [2023-02-18 00:30:56,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:56,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399267591] [2023-02-18 00:30:56,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:56,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9941 backedges. 2485 proven. 7456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:00,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:00,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399267591] [2023-02-18 00:31:00,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399267591] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:00,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454074739] [2023-02-18 00:31:00,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:31:00,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:00,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:00,035 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 00:31:00,036 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 00:31:00,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:31:00,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:00,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 148 conjunts are in the unsatisfiable core [2023-02-18 00:31:00,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9941 backedges. 2556 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:02,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9941 backedges. 2556 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:04,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454074739] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:04,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:04,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 77 [2023-02-18 00:31:04,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92525438] [2023-02-18 00:31:04,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:04,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-02-18 00:31:04,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:04,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-02-18 00:31:04,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2709, Invalid=3143, Unknown=0, NotChecked=0, Total=5852 [2023-02-18 00:31:04,517 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 77 states, 77 states have (on average 3.792207792207792) internal successors, (292), 77 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:05,452 INFO L93 Difference]: Finished difference Result 300 states and 301 transitions. [2023-02-18 00:31:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-02-18 00:31:05,452 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.792207792207792) internal successors, (292), 77 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2023-02-18 00:31:05,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:05,453 INFO L225 Difference]: With dead ends: 300 [2023-02-18 00:31:05,453 INFO L226 Difference]: Without dead ends: 298 [2023-02-18 00:31:05,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 362 SyntacticMatches, 282 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16037 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=8257, Invalid=14093, Unknown=0, NotChecked=0, Total=22350 [2023-02-18 00:31:05,455 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 152 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:05,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 40 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:31:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-02-18 00:31:05,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 292. [2023-02-18 00:31:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.006872852233677) internal successors, (293), 291 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2023-02-18 00:31:05,536 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 288 [2023-02-18 00:31:05,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:05,536 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2023-02-18 00:31:05,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.792207792207792) internal successors, (292), 77 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2023-02-18 00:31:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2023-02-18 00:31:05,538 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:05,538 INFO L195 NwaCegarLoop]: trace histogram [72, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:05,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2023-02-18 00:31:05,743 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 00:31:05,743 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash -169885747, now seen corresponding path program 141 times [2023-02-18 00:31:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:05,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553638660] [2023-02-18 00:31:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:05,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 7386 proven. 2767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:11,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:11,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553638660] [2023-02-18 00:31:11,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553638660] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:11,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930042618] [2023-02-18 00:31:11,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:31:11,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:11,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:11,591 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 00:31:11,592 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 00:31:11,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2023-02-18 00:31:11,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 146 conjunts are in the unsatisfiable core [2023-02-18 00:31:11,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 7597 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:16,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 7597 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:19,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930042618] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:19,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:19,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147, 147] total 221 [2023-02-18 00:31:19,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060050834] [2023-02-18 00:31:19,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:19,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 221 states [2023-02-18 00:31:19,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:19,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2023-02-18 00:31:19,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10882, Invalid=37738, Unknown=0, NotChecked=0, Total=48620 [2023-02-18 00:31:19,968 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand has 221 states, 221 states have (on average 2.316742081447964) internal successors, (512), 221 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:22,957 INFO L93 Difference]: Finished difference Result 513 states and 515 transitions. [2023-02-18 00:31:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2023-02-18 00:31:22,957 INFO L78 Accepts]: Start accepts. Automaton has has 221 states, 221 states have (on average 2.316742081447964) internal successors, (512), 221 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 291 [2023-02-18 00:31:22,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:22,958 INFO L225 Difference]: With dead ends: 513 [2023-02-18 00:31:22,958 INFO L226 Difference]: Without dead ends: 293 [2023-02-18 00:31:22,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 293 SyntacticMatches, 215 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40121 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=18988, Invalid=67154, Unknown=0, NotChecked=0, Total=86142 [2023-02-18 00:31:22,964 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 8 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:22,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 731 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:31:22,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-02-18 00:31:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2023-02-18 00:31:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0068493150684932) internal successors, (294), 292 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 294 transitions. [2023-02-18 00:31:23,047 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 294 transitions. Word has length 291 [2023-02-18 00:31:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:23,047 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 294 transitions. [2023-02-18 00:31:23,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 221 states, 221 states have (on average 2.316742081447964) internal successors, (512), 221 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 294 transitions. [2023-02-18 00:31:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-02-18 00:31:23,048 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:23,048 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:23,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2023-02-18 00:31:23,251 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 00:31:23,251 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash -550871160, now seen corresponding path program 142 times [2023-02-18 00:31:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:23,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137984519] [2023-02-18 00:31:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:23,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10225 backedges. 2556 proven. 7669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:26,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:26,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137984519] [2023-02-18 00:31:26,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137984519] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:26,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007265296] [2023-02-18 00:31:26,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:31:26,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:26,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:26,849 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 00:31:26,849 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 00:31:27,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:31:27,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:27,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 150 conjunts are in the unsatisfiable core [2023-02-18 00:31:27,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10225 backedges. 2628 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:29,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10225 backedges. 2628 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:31,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007265296] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:31,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:31,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 78 [2023-02-18 00:31:31,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791376509] [2023-02-18 00:31:31,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:31,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-02-18 00:31:31,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-02-18 00:31:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=3223, Unknown=0, NotChecked=0, Total=6006 [2023-02-18 00:31:31,102 INFO L87 Difference]: Start difference. First operand 293 states and 294 transitions. Second operand has 78 states, 78 states have (on average 3.7948717948717947) internal successors, (296), 78 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:32,054 INFO L93 Difference]: Finished difference Result 304 states and 305 transitions. [2023-02-18 00:31:32,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-02-18 00:31:32,055 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.7948717948717947) internal successors, (296), 78 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2023-02-18 00:31:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:32,055 INFO L225 Difference]: With dead ends: 304 [2023-02-18 00:31:32,055 INFO L226 Difference]: Without dead ends: 302 [2023-02-18 00:31:32,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 367 SyntacticMatches, 286 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16479 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=8481, Invalid=14471, Unknown=0, NotChecked=0, Total=22952 [2023-02-18 00:31:32,057 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 152 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:32,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 35 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:31:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-02-18 00:31:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 296. [2023-02-18 00:31:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.006779661016949) internal successors, (297), 295 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 297 transitions. [2023-02-18 00:31:32,141 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 297 transitions. Word has length 292 [2023-02-18 00:31:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:32,141 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 297 transitions. [2023-02-18 00:31:32,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.7948717948717947) internal successors, (296), 78 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 297 transitions. [2023-02-18 00:31:32,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-02-18 00:31:32,142 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:32,143 INFO L195 NwaCegarLoop]: trace histogram [73, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:32,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2023-02-18 00:31:32,348 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 00:31:32,349 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:32,349 INFO L85 PathProgramCache]: Analyzing trace with hash 72130737, now seen corresponding path program 143 times [2023-02-18 00:31:32,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:32,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794099718] [2023-02-18 00:31:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:32,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 7598 proven. 2842 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:38,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:38,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794099718] [2023-02-18 00:31:38,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794099718] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:38,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087130312] [2023-02-18 00:31:38,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:31:38,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:38,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:38,686 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 00:31:38,687 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 00:31:38,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2023-02-18 00:31:38,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 148 conjunts are in the unsatisfiable core [2023-02-18 00:31:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 7812 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:44,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 7812 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:47,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087130312] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:47,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:47,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149, 149] total 224 [2023-02-18 00:31:47,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745843794] [2023-02-18 00:31:47,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:47,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2023-02-18 00:31:47,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:47,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2023-02-18 00:31:47,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11179, Invalid=38773, Unknown=0, NotChecked=0, Total=49952 [2023-02-18 00:31:47,267 INFO L87 Difference]: Start difference. First operand 296 states and 297 transitions. Second operand has 224 states, 224 states have (on average 2.3169642857142856) internal successors, (519), 224 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:49,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:49,979 INFO L93 Difference]: Finished difference Result 520 states and 522 transitions. [2023-02-18 00:31:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-02-18 00:31:49,980 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 224 states have (on average 2.3169642857142856) internal successors, (519), 224 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2023-02-18 00:31:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:49,980 INFO L225 Difference]: With dead ends: 520 [2023-02-18 00:31:49,980 INFO L226 Difference]: Without dead ends: 297 [2023-02-18 00:31:49,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 297 SyntacticMatches, 218 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41226 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=19507, Invalid=68999, Unknown=0, NotChecked=0, Total=88506 [2023-02-18 00:31:49,986 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 8 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:49,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 960 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:31:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-02-18 00:31:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2023-02-18 00:31:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.0067567567567568) internal successors, (298), 296 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 298 transitions. [2023-02-18 00:31:50,100 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 298 transitions. Word has length 295 [2023-02-18 00:31:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:50,101 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 298 transitions. [2023-02-18 00:31:50,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 224 states have (on average 2.3169642857142856) internal successors, (519), 224 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 298 transitions. [2023-02-18 00:31:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-02-18 00:31:50,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:50,102 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:50,108 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 00:31:50,305 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 00:31:50,305 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash 58387180, now seen corresponding path program 144 times [2023-02-18 00:31:50,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:50,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751770073] [2023-02-18 00:31:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:50,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10513 backedges. 2628 proven. 7885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:53,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:53,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751770073] [2023-02-18 00:31:53,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751770073] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:53,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958636456] [2023-02-18 00:31:53,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:31:53,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:53,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:53,900 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 00:31:53,902 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 00:31:54,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2023-02-18 00:31:54,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:54,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 152 conjunts are in the unsatisfiable core [2023-02-18 00:31:54,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10513 backedges. 2701 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:56,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10513 backedges. 2701 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:58,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958636456] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:58,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:58,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 79 [2023-02-18 00:31:58,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545802365] [2023-02-18 00:31:58,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:58,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-02-18 00:31:58,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:58,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-02-18 00:31:58,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=3304, Unknown=0, NotChecked=0, Total=6162 [2023-02-18 00:31:58,371 INFO L87 Difference]: Start difference. First operand 297 states and 298 transitions. Second operand has 79 states, 79 states have (on average 3.7974683544303796) internal successors, (300), 79 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:59,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:59,396 INFO L93 Difference]: Finished difference Result 308 states and 309 transitions. [2023-02-18 00:31:59,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2023-02-18 00:31:59,396 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.7974683544303796) internal successors, (300), 79 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 296 [2023-02-18 00:31:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:59,397 INFO L225 Difference]: With dead ends: 308 [2023-02-18 00:31:59,397 INFO L226 Difference]: Without dead ends: 306 [2023-02-18 00:31:59,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 372 SyntacticMatches, 290 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16927 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=8708, Invalid=14854, Unknown=0, NotChecked=0, Total=23562 [2023-02-18 00:31:59,399 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 156 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:59,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 41 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:31:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-02-18 00:31:59,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 300. [2023-02-18 00:31:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.0066889632107023) internal successors, (301), 299 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 301 transitions. [2023-02-18 00:31:59,486 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 301 transitions. Word has length 296 [2023-02-18 00:31:59,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:59,486 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 301 transitions. [2023-02-18 00:31:59,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.7974683544303796) internal successors, (300), 79 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:59,487 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 301 transitions. [2023-02-18 00:31:59,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-02-18 00:31:59,487 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:59,487 INFO L195 NwaCegarLoop]: trace histogram [74, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:59,494 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 00:31:59,693 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 00:31:59,693 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:59,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:59,693 INFO L85 PathProgramCache]: Analyzing trace with hash -44455219, now seen corresponding path program 145 times [2023-02-18 00:31:59,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:59,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238079995] [2023-02-18 00:31:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:59,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 7813 proven. 2918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:05,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:32:05,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238079995] [2023-02-18 00:32:05,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238079995] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:32:05,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152154296] [2023-02-18 00:32:05,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:32:05,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:32:05,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:32:05,365 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 00:32:05,366 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 00:32:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:05,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 150 conjunts are in the unsatisfiable core [2023-02-18 00:32:05,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:32:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 8030 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:10,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:32:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 8030 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:14,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152154296] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:32:14,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:32:14,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151, 151] total 227 [2023-02-18 00:32:14,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111755717] [2023-02-18 00:32:14,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:32:14,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 227 states [2023-02-18 00:32:14,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:32:14,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 227 interpolants. [2023-02-18 00:32:14,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11480, Invalid=39822, Unknown=0, NotChecked=0, Total=51302 [2023-02-18 00:32:14,935 INFO L87 Difference]: Start difference. First operand 300 states and 301 transitions. Second operand has 227 states, 227 states have (on average 2.317180616740088) internal successors, (526), 227 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:17,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:32:17,740 INFO L93 Difference]: Finished difference Result 527 states and 529 transitions. [2023-02-18 00:32:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-02-18 00:32:17,741 INFO L78 Accepts]: Start accepts. Automaton has has 227 states, 227 states have (on average 2.317180616740088) internal successors, (526), 227 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 299 [2023-02-18 00:32:17,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:32:17,741 INFO L225 Difference]: With dead ends: 527 [2023-02-18 00:32:17,742 INFO L226 Difference]: Without dead ends: 301 [2023-02-18 00:32:17,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 301 SyntacticMatches, 221 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42346 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=20033, Invalid=70869, Unknown=0, NotChecked=0, Total=90902 [2023-02-18 00:32:17,746 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 8 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 2342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:32:17,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1181 Invalid, 2342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2342 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 00:32:17,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-02-18 00:32:17,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-02-18 00:32:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.0066666666666666) internal successors, (302), 300 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:17,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2023-02-18 00:32:17,832 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 299 [2023-02-18 00:32:17,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:32:17,832 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2023-02-18 00:32:17,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 227 states, 227 states have (on average 2.317180616740088) internal successors, (526), 227 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:17,833 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2023-02-18 00:32:17,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-02-18 00:32:17,834 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:32:17,834 INFO L195 NwaCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1, 1, 1] [2023-02-18 00:32:17,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2023-02-18 00:32:18,039 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 00:32:18,040 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:32:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:32:18,040 INFO L85 PathProgramCache]: Analyzing trace with hash -879599736, now seen corresponding path program 146 times [2023-02-18 00:32:18,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:32:18,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906652075] [2023-02-18 00:32:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:32:18,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:32:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10805 backedges. 2701 proven. 8104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:21,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:32:21,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906652075] [2023-02-18 00:32:21,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906652075] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:32:21,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744276074] [2023-02-18 00:32:21,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:32:21,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:32:21,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:32:21,871 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 00:32:21,873 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 00:32:22,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:32:22,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:32:22,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 154 conjunts are in the unsatisfiable core [2023-02-18 00:32:22,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:32:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10805 backedges. 2775 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:24,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:32:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10805 backedges. 2775 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:27,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744276074] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:32:27,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:32:27,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 80 [2023-02-18 00:32:27,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66574087] [2023-02-18 00:32:27,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:32:27,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-02-18 00:32:27,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:32:27,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-02-18 00:32:27,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2934, Invalid=3386, Unknown=0, NotChecked=0, Total=6320 [2023-02-18 00:32:27,059 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand has 80 states, 80 states have (on average 3.8) internal successors, (304), 80 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:32:28,322 INFO L93 Difference]: Finished difference Result 312 states and 313 transitions. [2023-02-18 00:32:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2023-02-18 00:32:28,323 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.8) internal successors, (304), 80 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2023-02-18 00:32:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:32:28,323 INFO L225 Difference]: With dead ends: 312 [2023-02-18 00:32:28,324 INFO L226 Difference]: Without dead ends: 310 [2023-02-18 00:32:28,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 377 SyntacticMatches, 294 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17381 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=8938, Invalid=15242, Unknown=0, NotChecked=0, Total=24180 [2023-02-18 00:32:28,326 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 306 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:32:28,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 28 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:32:28,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-02-18 00:32:28,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 304. [2023-02-18 00:32:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.0066006600660067) internal successors, (305), 303 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 305 transitions. [2023-02-18 00:32:28,414 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 305 transitions. Word has length 300 [2023-02-18 00:32:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:32:28,414 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 305 transitions. [2023-02-18 00:32:28,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.8) internal successors, (304), 80 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 305 transitions. [2023-02-18 00:32:28,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-02-18 00:32:28,415 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:32:28,415 INFO L195 NwaCegarLoop]: trace histogram [75, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2023-02-18 00:32:28,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2023-02-18 00:32:28,621 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 00:32:28,621 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:32:28,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:32:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash -555441999, now seen corresponding path program 147 times [2023-02-18 00:32:28,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:32:28,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218884698] [2023-02-18 00:32:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:32:28,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:32:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 8031 proven. 2995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:35,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:32:35,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218884698] [2023-02-18 00:32:35,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218884698] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:32:35,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558986006] [2023-02-18 00:32:35,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:32:35,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:32:35,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:32:35,096 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 00:32:35,097 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 00:32:35,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2023-02-18 00:32:35,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:32:35,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 152 conjunts are in the unsatisfiable core [2023-02-18 00:32:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:32:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 8251 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:41,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:32:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 8251 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:44,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558986006] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:32:44,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:32:44,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153, 153] total 230 [2023-02-18 00:32:44,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368164670] [2023-02-18 00:32:44,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:32:44,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 230 states [2023-02-18 00:32:44,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:32:44,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2023-02-18 00:32:44,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11785, Invalid=40885, Unknown=0, NotChecked=0, Total=52670 [2023-02-18 00:32:44,344 INFO L87 Difference]: Start difference. First operand 304 states and 305 transitions. Second operand has 230 states, 230 states have (on average 2.3173913043478263) internal successors, (533), 230 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:32:47,886 INFO L93 Difference]: Finished difference Result 534 states and 536 transitions. [2023-02-18 00:32:47,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2023-02-18 00:32:47,887 INFO L78 Accepts]: Start accepts. Automaton has has 230 states, 230 states have (on average 2.3173913043478263) internal successors, (533), 230 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 303 [2023-02-18 00:32:47,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:32:47,887 INFO L225 Difference]: With dead ends: 534 [2023-02-18 00:32:47,887 INFO L226 Difference]: Without dead ends: 305 [2023-02-18 00:32:47,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 305 SyntacticMatches, 224 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43481 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=20566, Invalid=72764, Unknown=0, NotChecked=0, Total=93330 [2023-02-18 00:32:47,892 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 8 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:32:47,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1162 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 00:32:47,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-02-18 00:32:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2023-02-18 00:32:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.006578947368421) internal successors, (306), 304 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2023-02-18 00:32:47,981 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 303 [2023-02-18 00:32:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:32:47,981 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2023-02-18 00:32:47,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 230 states, 230 states have (on average 2.3173913043478263) internal successors, (533), 230 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2023-02-18 00:32:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-02-18 00:32:47,982 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:32:47,982 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1, 1, 1, 1, 1] [2023-02-18 00:32:47,989 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 00:32:48,188 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 00:32:48,189 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:32:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:32:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1007779860, now seen corresponding path program 148 times [2023-02-18 00:32:48,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:32:48,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625595673] [2023-02-18 00:32:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:32:48,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:32:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:32:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11101 backedges. 2775 proven. 8326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:52,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:32:52,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625595673] [2023-02-18 00:32:52,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625595673] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:32:52,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21199768] [2023-02-18 00:32:52,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:32:52,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:32:52,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:32:52,093 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 00:32:52,095 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 00:32:52,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:32:52,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:32:52,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 156 conjunts are in the unsatisfiable core [2023-02-18 00:32:52,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:32:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11101 backedges. 2850 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:54,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:32:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11101 backedges. 2850 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:32:56,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21199768] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:32:56,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:32:56,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 81 [2023-02-18 00:32:56,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563006294] [2023-02-18 00:32:56,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:32:56,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-18 00:32:56,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:32:56,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-18 00:32:56,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3011, Invalid=3469, Unknown=0, NotChecked=0, Total=6480 [2023-02-18 00:32:56,729 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand has 81 states, 81 states have (on average 3.802469135802469) internal successors, (308), 81 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:57,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:32:57,729 INFO L93 Difference]: Finished difference Result 316 states and 317 transitions. [2023-02-18 00:32:57,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2023-02-18 00:32:57,730 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.802469135802469) internal successors, (308), 81 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2023-02-18 00:32:57,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:32:57,730 INFO L225 Difference]: With dead ends: 316 [2023-02-18 00:32:57,730 INFO L226 Difference]: Without dead ends: 314 [2023-02-18 00:32:57,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 382 SyntacticMatches, 298 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17841 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9171, Invalid=15635, Unknown=0, NotChecked=0, Total=24806 [2023-02-18 00:32:57,733 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 158 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:32:57,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 38 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:32:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-02-18 00:32:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 308. [2023-02-18 00:32:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.006514657980456) internal successors, (309), 307 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 309 transitions. [2023-02-18 00:32:57,823 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 309 transitions. Word has length 304 [2023-02-18 00:32:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:32:57,823 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 309 transitions. [2023-02-18 00:32:57,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.802469135802469) internal successors, (308), 81 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:32:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 309 transitions. [2023-02-18 00:32:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-02-18 00:32:57,824 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:32:57,824 INFO L195 NwaCegarLoop]: trace histogram [76, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2023-02-18 00:32:57,832 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 00:32:58,027 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 00:32:58,028 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:32:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:32:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash -943589939, now seen corresponding path program 149 times [2023-02-18 00:32:58,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:32:58,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602812189] [2023-02-18 00:32:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:32:58,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:32:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 8252 proven. 3073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:04,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:04,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602812189] [2023-02-18 00:33:04,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602812189] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:04,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410824234] [2023-02-18 00:33:04,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:33:04,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:04,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:04,419 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 00:33:04,420 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 00:33:04,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2023-02-18 00:33:04,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:04,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 154 conjunts are in the unsatisfiable core [2023-02-18 00:33:04,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 8475 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:09,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 8475 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:14,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410824234] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:14,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:14,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155, 155] total 233 [2023-02-18 00:33:14,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536942326] [2023-02-18 00:33:14,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:14,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 233 states [2023-02-18 00:33:14,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:14,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 233 interpolants. [2023-02-18 00:33:14,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12094, Invalid=41962, Unknown=0, NotChecked=0, Total=54056 [2023-02-18 00:33:14,274 INFO L87 Difference]: Start difference. First operand 308 states and 309 transitions. Second operand has 233 states, 233 states have (on average 2.3175965665236054) internal successors, (540), 233 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:17,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:17,109 INFO L93 Difference]: Finished difference Result 541 states and 543 transitions. [2023-02-18 00:33:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2023-02-18 00:33:17,109 INFO L78 Accepts]: Start accepts. Automaton has has 233 states, 233 states have (on average 2.3175965665236054) internal successors, (540), 233 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 307 [2023-02-18 00:33:17,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:17,110 INFO L225 Difference]: With dead ends: 541 [2023-02-18 00:33:17,110 INFO L226 Difference]: Without dead ends: 309 [2023-02-18 00:33:17,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 309 SyntacticMatches, 227 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44631 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=21106, Invalid=74684, Unknown=0, NotChecked=0, Total=95790 [2023-02-18 00:33:17,116 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 8 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 2344 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 2344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:17,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1182 Invalid, 2344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2344 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:33:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-02-18 00:33:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2023-02-18 00:33:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.0064935064935066) internal successors, (310), 308 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2023-02-18 00:33:17,224 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 307 [2023-02-18 00:33:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:17,224 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2023-02-18 00:33:17,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 233 states, 233 states have (on average 2.3175965665236054) internal successors, (540), 233 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:17,225 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2023-02-18 00:33:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-02-18 00:33:17,225 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:17,225 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:17,231 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 00:33:17,431 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 00:33:17,431 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:17,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1241759624, now seen corresponding path program 150 times [2023-02-18 00:33:17,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:17,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106103743] [2023-02-18 00:33:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:17,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11401 backedges. 2850 proven. 8551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:21,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:21,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106103743] [2023-02-18 00:33:21,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106103743] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:21,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347863327] [2023-02-18 00:33:21,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:33:21,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:21,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:21,563 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 00:33:21,565 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 00:33:21,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2023-02-18 00:33:21,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:21,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 158 conjunts are in the unsatisfiable core [2023-02-18 00:33:21,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11401 backedges. 2926 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:25,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11401 backedges. 2926 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:28,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347863327] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:28,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:28,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 82 [2023-02-18 00:33:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319310948] [2023-02-18 00:33:28,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:28,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-02-18 00:33:28,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:28,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-02-18 00:33:28,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3089, Invalid=3553, Unknown=0, NotChecked=0, Total=6642 [2023-02-18 00:33:28,778 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand has 82 states, 82 states have (on average 3.8048780487804876) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:30,256 INFO L93 Difference]: Finished difference Result 320 states and 321 transitions. [2023-02-18 00:33:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2023-02-18 00:33:30,256 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.8048780487804876) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 308 [2023-02-18 00:33:30,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:30,257 INFO L225 Difference]: With dead ends: 320 [2023-02-18 00:33:30,257 INFO L226 Difference]: Without dead ends: 318 [2023-02-18 00:33:30,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 387 SyntacticMatches, 302 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18307 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=9407, Invalid=16033, Unknown=0, NotChecked=0, Total=25440 [2023-02-18 00:33:30,259 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 160 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:30,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 38 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:33:30,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-02-18 00:33:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 312. [2023-02-18 00:33:30,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.0064308681672025) internal successors, (313), 311 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 313 transitions. [2023-02-18 00:33:30,353 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 313 transitions. Word has length 308 [2023-02-18 00:33:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:30,353 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 313 transitions. [2023-02-18 00:33:30,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.8048780487804876) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:30,353 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 313 transitions. [2023-02-18 00:33:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2023-02-18 00:33:30,354 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:30,354 INFO L195 NwaCegarLoop]: trace histogram [77, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:30,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2023-02-18 00:33:30,560 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 00:33:30,560 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:30,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:30,561 INFO L85 PathProgramCache]: Analyzing trace with hash 712458417, now seen corresponding path program 151 times [2023-02-18 00:33:30,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:30,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92062979] [2023-02-18 00:33:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:30,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 8476 proven. 3152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:38,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:38,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92062979] [2023-02-18 00:33:38,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92062979] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:38,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010036618] [2023-02-18 00:33:38,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:33:38,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:38,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:38,361 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 00:33:38,361 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 00:33:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:38,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 156 conjunts are in the unsatisfiable core [2023-02-18 00:33:38,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 8702 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:44,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 8702 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:49,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010036618] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:49,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:49,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157, 157] total 236 [2023-02-18 00:33:49,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040176397] [2023-02-18 00:33:49,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:49,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 236 states [2023-02-18 00:33:49,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:49,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2023-02-18 00:33:49,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12407, Invalid=43053, Unknown=0, NotChecked=0, Total=55460 [2023-02-18 00:33:49,153 INFO L87 Difference]: Start difference. First operand 312 states and 313 transitions. Second operand has 236 states, 236 states have (on average 2.3177966101694913) internal successors, (547), 236 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:52,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:52,915 INFO L93 Difference]: Finished difference Result 548 states and 550 transitions. [2023-02-18 00:33:52,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2023-02-18 00:33:52,915 INFO L78 Accepts]: Start accepts. Automaton has has 236 states, 236 states have (on average 2.3177966101694913) internal successors, (547), 236 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2023-02-18 00:33:52,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:52,916 INFO L225 Difference]: With dead ends: 548 [2023-02-18 00:33:52,916 INFO L226 Difference]: Without dead ends: 313 [2023-02-18 00:33:52,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 855 GetRequests, 313 SyntacticMatches, 230 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45796 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=21653, Invalid=76629, Unknown=0, NotChecked=0, Total=98282 [2023-02-18 00:33:52,922 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 8 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:52,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 935 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1889 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 00:33:52,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-02-18 00:33:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2023-02-18 00:33:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.0064102564102564) internal successors, (314), 312 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:53,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2023-02-18 00:33:53,015 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 311 [2023-02-18 00:33:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:53,015 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2023-02-18 00:33:53,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 236 states, 236 states have (on average 2.3177966101694913) internal successors, (547), 236 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2023-02-18 00:33:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-02-18 00:33:53,016 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:53,017 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:53,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2023-02-18 00:33:53,222 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 00:33:53,222 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:53,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:53,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1091062548, now seen corresponding path program 152 times [2023-02-18 00:33:53,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:53,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7654862] [2023-02-18 00:33:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:53,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 2926 proven. 8779 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:57,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:57,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7654862] [2023-02-18 00:33:57,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7654862] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:57,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181827585] [2023-02-18 00:33:57,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:33:57,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:57,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:57,647 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 00:33:57,657 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 00:33:57,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:33:57,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:57,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 160 conjunts are in the unsatisfiable core [2023-02-18 00:33:57,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:34:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 3003 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:34:00,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:34:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 3003 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:34:02,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181827585] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:34:02,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:34:02,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 83 [2023-02-18 00:34:02,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236287597] [2023-02-18 00:34:02,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:34:02,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-02-18 00:34:02,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:34:02,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-02-18 00:34:02,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3168, Invalid=3638, Unknown=0, NotChecked=0, Total=6806 [2023-02-18 00:34:02,726 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand has 83 states, 83 states have (on average 3.8072289156626504) internal successors, (316), 83 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:04,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:34:04,098 INFO L93 Difference]: Finished difference Result 324 states and 325 transitions. [2023-02-18 00:34:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2023-02-18 00:34:04,098 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.8072289156626504) internal successors, (316), 83 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 312 [2023-02-18 00:34:04,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:34:04,099 INFO L225 Difference]: With dead ends: 324 [2023-02-18 00:34:04,099 INFO L226 Difference]: Without dead ends: 322 [2023-02-18 00:34:04,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 858 GetRequests, 392 SyntacticMatches, 306 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18779 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=9646, Invalid=16436, Unknown=0, NotChecked=0, Total=26082 [2023-02-18 00:34:04,101 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 316 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:34:04,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 29 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:34:04,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-02-18 00:34:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 316. [2023-02-18 00:34:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.0063492063492063) internal successors, (317), 315 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 317 transitions. [2023-02-18 00:34:04,196 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 317 transitions. Word has length 312 [2023-02-18 00:34:04,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:34:04,196 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 317 transitions. [2023-02-18 00:34:04,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.8072289156626504) internal successors, (316), 83 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 317 transitions. [2023-02-18 00:34:04,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-02-18 00:34:04,197 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:34:04,197 INFO L195 NwaCegarLoop]: trace histogram [78, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2023-02-18 00:34:04,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2023-02-18 00:34:04,402 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 00:34:04,403 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:34:04,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:34:04,403 INFO L85 PathProgramCache]: Analyzing trace with hash 472948941, now seen corresponding path program 153 times [2023-02-18 00:34:04,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:34:04,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974633036] [2023-02-18 00:34:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:34:04,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:34:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat