./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de32.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/loops-crafted-1/in-de32.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:08:24,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:08:24,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:08:24,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:08:24,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:08:24,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:08:24,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:08:24,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:08:24,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:08:24,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:08:24,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:08:24,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:08:24,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:08:24,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:08:24,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:08:24,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:08:24,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:08:24,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:08:24,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:08:24,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:08:24,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:08:24,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:08:24,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:08:24,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:08:24,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:08:24,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:08:24,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:08:24,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:08:24,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:08:24,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:08:24,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:08:24,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:08:24,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:08:24,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:08:24,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:08:24,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:08:24,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:08:24,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:08:24,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:08:24,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:08:24,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:08:24,525 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:08:24,554 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:08:24,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:08:24,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:08:24,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:08:24,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:08:24,556 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:08:24,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:08:24,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:08:24,557 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:08:24,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:08:24,558 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:08:24,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:08:24,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:08:24,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:08:24,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:08:24,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:08:24,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:08:24,559 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:08:24,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:08:24,560 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:08:24,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:08:24,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:08:24,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:08:24,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:08:24,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:08:24,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:08:24,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:08:24,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:08:24,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:08:24,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:08:24,562 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:08:24,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:08:24,563 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:08:24,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:08:24,563 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:08:24,563 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 [2023-02-15 11:08:24,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:08:24,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:08:24,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:08:24,816 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:08:24,817 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:08:24,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de32.c [2023-02-15 11:08:25,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:08:26,135 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:08:26,136 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de32.c [2023-02-15 11:08:26,141 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48e7a0dea/ae5b79eb13a44196bba81afa7bc57cda/FLAGe7e7acee5 [2023-02-15 11:08:26,155 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48e7a0dea/ae5b79eb13a44196bba81afa7bc57cda [2023-02-15 11:08:26,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:08:26,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:08:26,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:08:26,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:08:26,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:08:26,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:08:26" (1/1) ... [2023-02-15 11:08:26,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d4c7dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26, skipping insertion in model container [2023-02-15 11:08:26,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:08:26" (1/1) ... [2023-02-15 11:08:26,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:08:26,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:08:26,284 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/loops-crafted-1/in-de32.c[368,381] [2023-02-15 11:08:26,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:08:26,302 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:08:26,310 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/loops-crafted-1/in-de32.c[368,381] [2023-02-15 11:08:26,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:08:26,323 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:08:26,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26 WrapperNode [2023-02-15 11:08:26,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:08:26,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:08:26,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:08:26,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:08:26,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26" (1/1) ... [2023-02-15 11:08:26,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26" (1/1) ... [2023-02-15 11:08:26,342 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2023-02-15 11:08:26,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:08:26,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:08:26,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:08:26,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:08:26,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26" (1/1) ... [2023-02-15 11:08:26,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26" (1/1) ... [2023-02-15 11:08:26,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26" (1/1) ... [2023-02-15 11:08:26,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26" (1/1) ... [2023-02-15 11:08:26,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26" (1/1) ... [2023-02-15 11:08:26,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26" (1/1) ... [2023-02-15 11:08:26,357 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26" (1/1) ... [2023-02-15 11:08:26,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26" (1/1) ... [2023-02-15 11:08:26,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:08:26,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:08:26,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:08:26,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:08:26,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26" (1/1) ... [2023-02-15 11:08:26,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:08:26,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:26,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 11:08:26,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 11:08:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:08:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:08:26,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:08:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:08:26,489 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:08:26,490 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:08:26,659 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:08:26,663 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:08:26,664 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 11:08:26,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:08:26 BoogieIcfgContainer [2023-02-15 11:08:26,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:08:26,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:08:26,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:08:26,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:08:26,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:08:26" (1/3) ... [2023-02-15 11:08:26,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb45f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:08:26, skipping insertion in model container [2023-02-15 11:08:26,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:08:26" (2/3) ... [2023-02-15 11:08:26,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb45f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:08:26, skipping insertion in model container [2023-02-15 11:08:26,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:08:26" (3/3) ... [2023-02-15 11:08:26,672 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de32.c [2023-02-15 11:08:26,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:08:26,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:08:26,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:08:26,743 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;@5f1cc14f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:08:26,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:08:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 11:08:26,751 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:26,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:26,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:26,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1157484939, now seen corresponding path program 1 times [2023-02-15 11:08:26,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:26,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960126350] [2023-02-15 11:08:26,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:26,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:08:27,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:27,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960126350] [2023-02-15 11:08:27,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960126350] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:08:27,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:08:27,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 11:08:27,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856541138] [2023-02-15 11:08:27,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:08:27,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:08:27,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:27,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:08:27,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:08:27,101 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:27,162 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2023-02-15 11:08:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 11:08:27,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-15 11:08:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:27,170 INFO L225 Difference]: With dead ends: 33 [2023-02-15 11:08:27,170 INFO L226 Difference]: Without dead ends: 12 [2023-02-15 11:08:27,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:08:27,175 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:27,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:08:27,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-15 11:08:27,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-15 11:08:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2023-02-15 11:08:27,201 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2023-02-15 11:08:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:27,202 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2023-02-15 11:08:27,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:27,202 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2023-02-15 11:08:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 11:08:27,203 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:27,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:27,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 11:08:27,215 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:27,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:27,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1520629346, now seen corresponding path program 1 times [2023-02-15 11:08:27,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:27,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546370985] [2023-02-15 11:08:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:27,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:08:27,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:27,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546370985] [2023-02-15 11:08:27,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546370985] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:08:27,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:08:27,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:08:27,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078111257] [2023-02-15 11:08:27,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:08:27,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 11:08:27,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:27,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 11:08:27,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 11:08:27,305 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:27,319 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2023-02-15 11:08:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 11:08:27,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 11:08:27,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:27,320 INFO L225 Difference]: With dead ends: 27 [2023-02-15 11:08:27,320 INFO L226 Difference]: Without dead ends: 21 [2023-02-15 11:08:27,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 11:08:27,322 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:27,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:08:27,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-15 11:08:27,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2023-02-15 11:08:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-02-15 11:08:27,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2023-02-15 11:08:27,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:27,334 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-02-15 11:08:27,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:27,335 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-02-15 11:08:27,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 11:08:27,336 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:27,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:27,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 11:08:27,338 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:27,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1475376817, now seen corresponding path program 1 times [2023-02-15 11:08:27,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:27,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29653505] [2023-02-15 11:08:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:27,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:08:27,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:27,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29653505] [2023-02-15 11:08:27,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29653505] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:08:27,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:08:27,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 11:08:27,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782989194] [2023-02-15 11:08:27,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:08:27,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:08:27,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:08:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:08:27,441 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:27,478 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2023-02-15 11:08:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:08:27,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 11:08:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:27,479 INFO L225 Difference]: With dead ends: 21 [2023-02-15 11:08:27,479 INFO L226 Difference]: Without dead ends: 13 [2023-02-15 11:08:27,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:08:27,481 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 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 [2023-02-15 11:08:27,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:08:27,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-15 11:08:27,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-15 11:08:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-02-15 11:08:27,489 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2023-02-15 11:08:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:27,490 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-02-15 11:08:27,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-02-15 11:08:27,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 11:08:27,491 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:27,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:27,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 11:08:27,491 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:27,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:27,497 INFO L85 PathProgramCache]: Analyzing trace with hash 925156739, now seen corresponding path program 1 times [2023-02-15 11:08:27,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:27,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774022085] [2023-02-15 11:08:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:27,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:08:27,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:27,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774022085] [2023-02-15 11:08:27,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774022085] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:27,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971256077] [2023-02-15 11:08:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:27,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:27,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:27,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:27,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 11:08:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:27,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 11:08:27,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:08:27,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:08:27,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971256077] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:27,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:08:27,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-02-15 11:08:27,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894270538] [2023-02-15 11:08:27,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:08:27,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:08:27,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:27,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:08:27,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 11:08:27,759 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:27,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:27,774 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2023-02-15 11:08:27,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:08:27,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 11:08:27,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:27,775 INFO L225 Difference]: With dead ends: 18 [2023-02-15 11:08:27,775 INFO L226 Difference]: Without dead ends: 12 [2023-02-15 11:08:27,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 11:08:27,777 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:27,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:08:27,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-15 11:08:27,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-15 11:08:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-15 11:08:27,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 11 [2023-02-15 11:08:27,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:27,782 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-15 11:08:27,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-15 11:08:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 11:08:27,783 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:27,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:27,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:27,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:27,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:27,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:27,989 INFO L85 PathProgramCache]: Analyzing trace with hash 970409268, now seen corresponding path program 1 times [2023-02-15 11:08:27,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:27,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092147069] [2023-02-15 11:08:27,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:27,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:08:28,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:28,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092147069] [2023-02-15 11:08:28,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092147069] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:28,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863543776] [2023-02-15 11:08:28,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:28,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:28,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:28,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:28,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 11:08:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:28,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 11:08:28,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:08:28,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:08:28,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863543776] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:28,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:08:28,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2023-02-15 11:08:28,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079773862] [2023-02-15 11:08:28,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:08:28,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:08:28,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:28,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:08:28,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-15 11:08:28,201 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:28,218 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2023-02-15 11:08:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:08:28,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 11:08:28,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:28,220 INFO L225 Difference]: With dead ends: 17 [2023-02-15 11:08:28,220 INFO L226 Difference]: Without dead ends: 13 [2023-02-15 11:08:28,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-15 11:08:28,222 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:28,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:08:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-15 11:08:28,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-15 11:08:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-15 11:08:28,227 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2023-02-15 11:08:28,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:28,227 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-15 11:08:28,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:28,227 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-15 11:08:28,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 11:08:28,228 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:28,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:28,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:28,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:28,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash 19581631, now seen corresponding path program 1 times [2023-02-15 11:08:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:28,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319860392] [2023-02-15 11:08:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:28,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:08:28,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:28,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319860392] [2023-02-15 11:08:28,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319860392] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:28,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6231809] [2023-02-15 11:08:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:28,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:28,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:28,619 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:28,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 11:08:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:28,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 11:08:28,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:08:28,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:08:28,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6231809] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:28,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:28,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-02-15 11:08:28,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593099750] [2023-02-15 11:08:28,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:28,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 11:08:28,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:28,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 11:08:28,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 11:08:28,817 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:28,856 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-02-15 11:08:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 11:08:28,857 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) Word has length 12 [2023-02-15 11:08:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:28,857 INFO L225 Difference]: With dead ends: 20 [2023-02-15 11:08:28,857 INFO L226 Difference]: Without dead ends: 16 [2023-02-15 11:08:28,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 11:08:28,860 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:28,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:08:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-15 11:08:28,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2023-02-15 11:08:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-02-15 11:08:28,869 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 12 [2023-02-15 11:08:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:28,869 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-02-15 11:08:28,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-02-15 11:08:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 11:08:28,871 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:28,871 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:28,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 11:08:29,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:29,076 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:29,077 INFO L85 PathProgramCache]: Analyzing trace with hash 608695956, now seen corresponding path program 2 times [2023-02-15 11:08:29,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:29,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377617200] [2023-02-15 11:08:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:29,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:08:29,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:29,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377617200] [2023-02-15 11:08:29,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377617200] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:29,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963774246] [2023-02-15 11:08:29,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:08:29,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:29,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:29,137 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:29,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 11:08:29,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:08:29,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:29,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 11:08:29,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:08:29,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:08:29,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963774246] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:29,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:29,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 10 [2023-02-15 11:08:29,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242578304] [2023-02-15 11:08:29,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:29,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 11:08:29,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:29,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 11:08:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:08:29,278 INFO L87 Difference]: Start difference. First operand 15 states and 18 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) [2023-02-15 11:08:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:29,343 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2023-02-15 11:08:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 11:08:29,344 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 13 [2023-02-15 11:08:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:29,347 INFO L225 Difference]: With dead ends: 29 [2023-02-15 11:08:29,347 INFO L226 Difference]: Without dead ends: 15 [2023-02-15 11:08:29,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-02-15 11:08:29,349 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:29,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 27 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:08:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-15 11:08:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-15 11:08:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2023-02-15 11:08:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-15 11:08:29,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 13 [2023-02-15 11:08:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:29,366 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-15 11:08:29,366 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) [2023-02-15 11:08:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-15 11:08:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 11:08:29,367 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:29,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:29,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:29,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:29,572 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:29,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:29,573 INFO L85 PathProgramCache]: Analyzing trace with hash 304605950, now seen corresponding path program 3 times [2023-02-15 11:08:29,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:29,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875214491] [2023-02-15 11:08:29,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:29,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:08:29,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:29,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875214491] [2023-02-15 11:08:29,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875214491] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:29,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530613970] [2023-02-15 11:08:29,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:08:29,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:29,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:29,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:29,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 11:08:29,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 11:08:29,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:29,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 11:08:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:08:29,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:08:29,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530613970] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:29,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:29,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2023-02-15 11:08:29,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166423998] [2023-02-15 11:08:29,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:29,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 11:08:29,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:29,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 11:08:29,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-02-15 11:08:29,829 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:29,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:29,890 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2023-02-15 11:08:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 11:08:29,891 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-15 11:08:29,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:29,892 INFO L225 Difference]: With dead ends: 44 [2023-02-15 11:08:29,892 INFO L226 Difference]: Without dead ends: 39 [2023-02-15 11:08:29,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:08:29,893 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:29,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 33 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:08:29,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-15 11:08:29,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2023-02-15 11:08:29,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-15 11:08:29,909 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2023-02-15 11:08:29,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:29,909 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-15 11:08:29,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:29,909 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-15 11:08:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 11:08:29,910 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:29,910 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:29,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:30,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:30,116 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:30,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash 854515253, now seen corresponding path program 4 times [2023-02-15 11:08:30,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:30,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876274101] [2023-02-15 11:08:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:30,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:08:30,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:30,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876274101] [2023-02-15 11:08:30,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876274101] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:30,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399522312] [2023-02-15 11:08:30,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:08:30,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:30,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:30,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:30,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 11:08:30,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:08:30,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:30,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 11:08:30,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:08:30,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:08:30,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399522312] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:30,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:30,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2023-02-15 11:08:30,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262168356] [2023-02-15 11:08:30,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:30,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 11:08:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 11:08:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 11:08:30,338 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:30,389 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2023-02-15 11:08:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:08:30,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 15 [2023-02-15 11:08:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:30,397 INFO L225 Difference]: With dead ends: 36 [2023-02-15 11:08:30,398 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 11:08:30,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 11:08:30,400 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:30,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:08:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 11:08:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-02-15 11:08:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-02-15 11:08:30,411 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2023-02-15 11:08:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:30,412 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-02-15 11:08:30,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:30,412 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-02-15 11:08:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 11:08:30,412 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:30,412 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:30,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:30,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:30,613 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:30,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:30,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1259841871, now seen corresponding path program 5 times [2023-02-15 11:08:30,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:30,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852802474] [2023-02-15 11:08:30,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:30,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:08:30,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:30,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852802474] [2023-02-15 11:08:30,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852802474] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:30,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311090711] [2023-02-15 11:08:30,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:08:30,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:30,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:30,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:30,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 11:08:30,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-15 11:08:30,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:30,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 11:08:30,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:08:30,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:08:31,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311090711] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:31,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:31,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2023-02-15 11:08:31,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239063618] [2023-02-15 11:08:31,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:31,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 11:08:31,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:31,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 11:08:31,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-02-15 11:08:31,044 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:31,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:31,703 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2023-02-15 11:08:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 11:08:31,704 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 11:08:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:31,704 INFO L225 Difference]: With dead ends: 67 [2023-02-15 11:08:31,704 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 11:08:31,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 11:08:31,706 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 85 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:31,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 71 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:08:31,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 11:08:31,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2023-02-15 11:08:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 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) [2023-02-15 11:08:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-02-15 11:08:31,718 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 16 [2023-02-15 11:08:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:31,718 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-02-15 11:08:31,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:31,719 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-02-15 11:08:31,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 11:08:31,719 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:31,719 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:31,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:31,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:31,924 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:31,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1333529985, now seen corresponding path program 6 times [2023-02-15 11:08:31,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:31,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879977877] [2023-02-15 11:08:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:31,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 11:08:32,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:32,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879977877] [2023-02-15 11:08:32,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879977877] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:32,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699278021] [2023-02-15 11:08:32,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:08:32,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:32,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:32,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:32,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 11:08:32,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-15 11:08:32,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:32,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 11:08:32,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 11:08:32,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 11:08:32,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699278021] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:32,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:32,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-02-15 11:08:32,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045070904] [2023-02-15 11:08:32,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:32,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 11:08:32,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:32,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 11:08:32,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 11:08:32,208 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:32,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:32,256 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2023-02-15 11:08:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 11:08:32,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) Word has length 18 [2023-02-15 11:08:32,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:32,257 INFO L225 Difference]: With dead ends: 44 [2023-02-15 11:08:32,257 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 11:08:32,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-15 11:08:32,258 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:32,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:08:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 11:08:32,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2023-02-15 11:08:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-02-15 11:08:32,269 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 18 [2023-02-15 11:08:32,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:32,269 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-02-15 11:08:32,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-02-15 11:08:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 11:08:32,270 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:32,270 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:32,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:32,475 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,SelfDestructingSolverStorable10 [2023-02-15 11:08:32,475 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash -342215874, now seen corresponding path program 7 times [2023-02-15 11:08:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:32,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227567284] [2023-02-15 11:08:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:32,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 11:08:32,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:32,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227567284] [2023-02-15 11:08:32,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227567284] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:32,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486576294] [2023-02-15 11:08:32,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:08:32,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:32,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:32,597 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:32,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 11:08:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:32,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 11:08:32,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:08:32,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 11:08:32,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486576294] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:32,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:32,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 20 [2023-02-15 11:08:32,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69141323] [2023-02-15 11:08:32,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:32,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 11:08:32,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 11:08:32,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-02-15 11:08:32,864 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:33,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:33,256 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2023-02-15 11:08:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 11:08:33,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-15 11:08:33,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:33,259 INFO L225 Difference]: With dead ends: 120 [2023-02-15 11:08:33,259 INFO L226 Difference]: Without dead ends: 100 [2023-02-15 11:08:33,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=703, Unknown=0, NotChecked=0, Total=992 [2023-02-15 11:08:33,260 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 83 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:33,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 67 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:08:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-15 11:08:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 42. [2023-02-15 11:08:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-02-15 11:08:33,274 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 20 [2023-02-15 11:08:33,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:33,275 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-02-15 11:08:33,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-02-15 11:08:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 11:08:33,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:33,276 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:33,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:33,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:33,481 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:33,481 INFO L85 PathProgramCache]: Analyzing trace with hash -2017092107, now seen corresponding path program 8 times [2023-02-15 11:08:33,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:33,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397489358] [2023-02-15 11:08:33,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:33,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 11:08:33,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:33,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397489358] [2023-02-15 11:08:33,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397489358] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:33,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003035056] [2023-02-15 11:08:33,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:08:33,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:33,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:33,622 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:33,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 11:08:33,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:08:33,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:33,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 11:08:33,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 11:08:33,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 11:08:33,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003035056] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:33,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:33,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2023-02-15 11:08:33,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786255995] [2023-02-15 11:08:33,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:33,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 11:08:33,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:33,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 11:08:33,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-02-15 11:08:33,740 INFO L87 Difference]: Start difference. First operand 42 states and 50 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) [2023-02-15 11:08:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:33,825 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2023-02-15 11:08:33,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 11:08:33,825 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 21 [2023-02-15 11:08:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:33,826 INFO L225 Difference]: With dead ends: 60 [2023-02-15 11:08:33,826 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 11:08:33,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:08:33,827 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:33,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 67 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:08:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 11:08:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2023-02-15 11:08:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 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) [2023-02-15 11:08:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-02-15 11:08:33,841 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 21 [2023-02-15 11:08:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:33,841 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-02-15 11:08:33,841 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) [2023-02-15 11:08:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-02-15 11:08:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 11:08:33,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:33,842 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:33,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:34,047 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,SelfDestructingSolverStorable12 [2023-02-15 11:08:34,048 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:34,048 INFO L85 PathProgramCache]: Analyzing trace with hash -769603249, now seen corresponding path program 9 times [2023-02-15 11:08:34,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:34,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275803658] [2023-02-15 11:08:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:34,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 11:08:34,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:34,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275803658] [2023-02-15 11:08:34,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275803658] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:34,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847359994] [2023-02-15 11:08:34,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:08:34,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:34,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:34,208 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:34,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 11:08:34,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 11:08:34,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 11:08:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 11:08:34,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 11:08:34,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847359994] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:34,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:34,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2023-02-15 11:08:34,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942223357] [2023-02-15 11:08:34,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:34,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 11:08:34,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:34,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 11:08:34,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-02-15 11:08:34,624 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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) [2023-02-15 11:08:35,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:35,292 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2023-02-15 11:08:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 11:08:35,292 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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 22 [2023-02-15 11:08:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:35,293 INFO L225 Difference]: With dead ends: 125 [2023-02-15 11:08:35,293 INFO L226 Difference]: Without dead ends: 109 [2023-02-15 11:08:35,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 11:08:35,295 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 111 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:35,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 100 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:08:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-15 11:08:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 31. [2023-02-15 11:08:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-02-15 11:08:35,310 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 22 [2023-02-15 11:08:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:35,310 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-02-15 11:08:35,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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) [2023-02-15 11:08:35,311 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-02-15 11:08:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 11:08:35,311 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:35,311 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:35,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:35,517 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,SelfDestructingSolverStorable13 [2023-02-15 11:08:35,517 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:35,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:35,518 INFO L85 PathProgramCache]: Analyzing trace with hash -550178924, now seen corresponding path program 10 times [2023-02-15 11:08:35,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:35,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777435352] [2023-02-15 11:08:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:35,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:08:35,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:35,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777435352] [2023-02-15 11:08:35,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777435352] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:35,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201735734] [2023-02-15 11:08:35,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:08:35,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:35,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:35,696 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:35,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 11:08:35,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:08:35,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:35,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 11:08:35,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:08:35,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 11:08:35,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201735734] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:35,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:35,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 24 [2023-02-15 11:08:35,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736882734] [2023-02-15 11:08:35,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:35,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 11:08:35,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:35,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 11:08:35,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-02-15 11:08:35,988 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:36,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:36,499 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2023-02-15 11:08:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 11:08:36,499 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 11:08:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:36,500 INFO L225 Difference]: With dead ends: 65 [2023-02-15 11:08:36,500 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 11:08:36,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-02-15 11:08:36,501 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:36,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 114 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:08:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 11:08:36,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-02-15 11:08:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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) [2023-02-15 11:08:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2023-02-15 11:08:36,521 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 23 [2023-02-15 11:08:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:36,521 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2023-02-15 11:08:36,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2023-02-15 11:08:36,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 11:08:36,523 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:36,523 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:36,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:36,727 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,SelfDestructingSolverStorable14 [2023-02-15 11:08:36,728 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:36,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1583324771, now seen corresponding path program 11 times [2023-02-15 11:08:36,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:36,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553805597] [2023-02-15 11:08:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:36,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 11:08:36,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:36,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553805597] [2023-02-15 11:08:36,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553805597] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:36,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485587469] [2023-02-15 11:08:36,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:08:36,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:36,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:36,907 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:36,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 11:08:37,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 11:08:37,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:37,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 11:08:37,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 11:08:37,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 11:08:37,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485587469] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:37,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:37,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 22 [2023-02-15 11:08:37,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430547511] [2023-02-15 11:08:37,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:37,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 11:08:37,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:37,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 11:08:37,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-02-15 11:08:37,339 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2023-02-15 11:08:38,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:38,076 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2023-02-15 11:08:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 11:08:38,076 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 11:08:38,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:38,076 INFO L225 Difference]: With dead ends: 88 [2023-02-15 11:08:38,077 INFO L226 Difference]: Without dead ends: 75 [2023-02-15 11:08:38,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 11:08:38,078 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:38,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 96 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:08:38,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-15 11:08:38,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2023-02-15 11:08:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 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) [2023-02-15 11:08:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2023-02-15 11:08:38,101 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 23 [2023-02-15 11:08:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:38,102 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2023-02-15 11:08:38,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2023-02-15 11:08:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2023-02-15 11:08:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 11:08:38,107 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:38,107 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:38,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:38,307 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,SelfDestructingSolverStorable15 [2023-02-15 11:08:38,308 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:38,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1230457407, now seen corresponding path program 12 times [2023-02-15 11:08:38,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:38,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677293608] [2023-02-15 11:08:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:38,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 11:08:38,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:38,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677293608] [2023-02-15 11:08:38,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677293608] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:38,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425560226] [2023-02-15 11:08:38,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:08:38,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:38,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:38,501 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:38,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 11:08:38,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 11:08:38,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:38,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 11:08:38,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 11:08:38,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 11:08:38,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425560226] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:38,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:38,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2023-02-15 11:08:38,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142315294] [2023-02-15 11:08:38,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:38,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 11:08:38,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:38,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 11:08:38,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:08:38,652 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:38,770 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2023-02-15 11:08:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 11:08:38,771 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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 24 [2023-02-15 11:08:38,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:38,773 INFO L225 Difference]: With dead ends: 90 [2023-02-15 11:08:38,773 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 11:08:38,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-15 11:08:38,774 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:38,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 68 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:08:38,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 11:08:38,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2023-02-15 11:08:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 62 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) [2023-02-15 11:08:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2023-02-15 11:08:38,806 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 24 [2023-02-15 11:08:38,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:38,806 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2023-02-15 11:08:38,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:38,806 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2023-02-15 11:08:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 11:08:38,807 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:38,808 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:38,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:39,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:39,013 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:39,013 INFO L85 PathProgramCache]: Analyzing trace with hash -40778609, now seen corresponding path program 13 times [2023-02-15 11:08:39,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:39,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273399830] [2023-02-15 11:08:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:39,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:08:39,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:39,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273399830] [2023-02-15 11:08:39,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273399830] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:39,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524926510] [2023-02-15 11:08:39,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:08:39,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:39,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:39,250 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:39,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 11:08:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:39,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 11:08:39,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:08:39,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:08:39,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524926510] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:39,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:39,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2023-02-15 11:08:39,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847835112] [2023-02-15 11:08:39,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:39,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 11:08:39,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:39,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 11:08:39,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 11:08:39,709 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:40,766 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2023-02-15 11:08:40,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 11:08:40,767 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 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 26 [2023-02-15 11:08:40,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:40,767 INFO L225 Difference]: With dead ends: 98 [2023-02-15 11:08:40,767 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 11:08:40,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=310, Invalid=1670, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 11:08:40,768 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:40,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 161 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:08:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 11:08:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2023-02-15 11:08:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.161764705882353) internal successors, (79), 68 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2023-02-15 11:08:40,795 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 26 [2023-02-15 11:08:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:40,795 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2023-02-15 11:08:40,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2023-02-15 11:08:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 11:08:40,796 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:40,796 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:40,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:41,001 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,SelfDestructingSolverStorable17 [2023-02-15 11:08:41,001 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:41,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1512440994, now seen corresponding path program 14 times [2023-02-15 11:08:41,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:41,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404573963] [2023-02-15 11:08:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:41,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 11:08:41,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:41,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404573963] [2023-02-15 11:08:41,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404573963] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:41,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907421993] [2023-02-15 11:08:41,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:08:41,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:41,232 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:41,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 11:08:41,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:08:41,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:41,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 11:08:41,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 11:08:41,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 11:08:41,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907421993] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:41,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:41,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 12] total 31 [2023-02-15 11:08:41,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154670559] [2023-02-15 11:08:41,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:41,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 11:08:41,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:41,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 11:08:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2023-02-15 11:08:41,657 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 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) [2023-02-15 11:08:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:43,087 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2023-02-15 11:08:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-15 11:08:43,087 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 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) Word has length 26 [2023-02-15 11:08:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:43,088 INFO L225 Difference]: With dead ends: 119 [2023-02-15 11:08:43,088 INFO L226 Difference]: Without dead ends: 96 [2023-02-15 11:08:43,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=432, Invalid=2990, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 11:08:43,089 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:43,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 182 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 11:08:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-15 11:08:43,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2023-02-15 11:08:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 83 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) [2023-02-15 11:08:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2023-02-15 11:08:43,131 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 26 [2023-02-15 11:08:43,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:43,131 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2023-02-15 11:08:43,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 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) [2023-02-15 11:08:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2023-02-15 11:08:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 11:08:43,132 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:43,132 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:43,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:43,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:43,339 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:43,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:43,339 INFO L85 PathProgramCache]: Analyzing trace with hash -495934077, now seen corresponding path program 15 times [2023-02-15 11:08:43,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:43,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146866363] [2023-02-15 11:08:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:43,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 11:08:43,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:43,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146866363] [2023-02-15 11:08:43,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146866363] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:43,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829571130] [2023-02-15 11:08:43,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:08:43,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:43,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:43,518 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:43,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 11:08:43,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 11:08:43,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:43,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 11:08:43,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 11:08:43,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 11:08:44,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829571130] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:44,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:44,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2023-02-15 11:08:44,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947952824] [2023-02-15 11:08:44,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:44,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 11:08:44,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:44,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 11:08:44,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2023-02-15 11:08:44,015 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:44,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:44,903 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2023-02-15 11:08:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 11:08:44,903 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 11:08:44,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:44,904 INFO L225 Difference]: With dead ends: 142 [2023-02-15 11:08:44,904 INFO L226 Difference]: Without dead ends: 122 [2023-02-15 11:08:44,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=446, Invalid=1716, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 11:08:44,905 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 85 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:44,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 115 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:08:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-15 11:08:44,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2023-02-15 11:08:44,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 74 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) [2023-02-15 11:08:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2023-02-15 11:08:44,933 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 27 [2023-02-15 11:08:44,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:44,934 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2023-02-15 11:08:44,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:44,934 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2023-02-15 11:08:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 11:08:44,934 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:44,934 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:44,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:45,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:45,137 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:45,138 INFO L85 PathProgramCache]: Analyzing trace with hash 881225141, now seen corresponding path program 16 times [2023-02-15 11:08:45,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:45,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097126353] [2023-02-15 11:08:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:45,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:08:45,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:45,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097126353] [2023-02-15 11:08:45,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097126353] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:45,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819392347] [2023-02-15 11:08:45,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:08:45,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:45,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:45,353 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:45,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 11:08:45,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:08:45,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:45,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 11:08:45,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:08:45,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:08:45,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819392347] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:45,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:45,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2023-02-15 11:08:45,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035846378] [2023-02-15 11:08:45,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:45,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 11:08:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:45,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 11:08:45,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-02-15 11:08:45,489 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:45,627 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2023-02-15 11:08:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 11:08:45,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 27 [2023-02-15 11:08:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:45,629 INFO L225 Difference]: With dead ends: 94 [2023-02-15 11:08:45,629 INFO L226 Difference]: Without dead ends: 83 [2023-02-15 11:08:45,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-15 11:08:45,630 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:45,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 66 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:08:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-15 11:08:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2023-02-15 11:08:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2023-02-15 11:08:45,669 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 27 [2023-02-15 11:08:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:45,669 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2023-02-15 11:08:45,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2023-02-15 11:08:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 11:08:45,670 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:45,670 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:45,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:45,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:45,876 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:45,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:45,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2029727233, now seen corresponding path program 17 times [2023-02-15 11:08:45,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:45,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399881811] [2023-02-15 11:08:45,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:45,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 11:08:46,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:46,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399881811] [2023-02-15 11:08:46,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399881811] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:46,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149360794] [2023-02-15 11:08:46,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:08:46,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:46,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:46,107 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:46,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 11:08:46,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 11:08:46,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:46,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 11:08:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 11:08:46,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 11:08:46,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149360794] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:46,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:46,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2023-02-15 11:08:46,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061183596] [2023-02-15 11:08:46,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:46,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 11:08:46,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:46,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 11:08:46,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-02-15 11:08:46,703 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:46,833 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2023-02-15 11:08:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 11:08:46,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) Word has length 30 [2023-02-15 11:08:46,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:46,835 INFO L225 Difference]: With dead ends: 109 [2023-02-15 11:08:46,835 INFO L226 Difference]: Without dead ends: 97 [2023-02-15 11:08:46,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:08:46,836 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:46,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 99 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:08:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-15 11:08:46,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2023-02-15 11:08:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 85 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2023-02-15 11:08:46,870 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 30 [2023-02-15 11:08:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:46,870 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2023-02-15 11:08:46,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:46,870 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2023-02-15 11:08:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 11:08:46,871 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:46,871 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:46,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:47,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:47,071 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:47,072 INFO L85 PathProgramCache]: Analyzing trace with hash -760250749, now seen corresponding path program 18 times [2023-02-15 11:08:47,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:47,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858252133] [2023-02-15 11:08:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:47,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 11:08:47,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:47,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858252133] [2023-02-15 11:08:47,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858252133] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:47,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607220750] [2023-02-15 11:08:47,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:08:47,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:47,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:47,376 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:47,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 11:08:47,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 11:08:47,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:47,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 11:08:47,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 11:08:47,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 11:08:48,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607220750] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:48,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:48,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2023-02-15 11:08:48,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218505330] [2023-02-15 11:08:48,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:48,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 11:08:48,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 11:08:48,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 11:08:48,146 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:51,776 INFO L93 Difference]: Finished difference Result 272 states and 315 transitions. [2023-02-15 11:08:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-15 11:08:51,777 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-15 11:08:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:51,778 INFO L225 Difference]: With dead ends: 272 [2023-02-15 11:08:51,778 INFO L226 Difference]: Without dead ends: 236 [2023-02-15 11:08:51,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1213, Invalid=4639, Unknown=0, NotChecked=0, Total=5852 [2023-02-15 11:08:51,780 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 279 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:51,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 167 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 11:08:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-02-15 11:08:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 76. [2023-02-15 11:08:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.2) internal successors, (90), 75 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2023-02-15 11:08:51,810 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 31 [2023-02-15 11:08:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:51,810 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2023-02-15 11:08:51,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:51,810 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2023-02-15 11:08:51,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 11:08:51,810 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:51,811 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:51,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 11:08:52,011 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,SelfDestructingSolverStorable22 [2023-02-15 11:08:52,011 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:52,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:52,012 INFO L85 PathProgramCache]: Analyzing trace with hash 469702512, now seen corresponding path program 19 times [2023-02-15 11:08:52,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:52,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305979858] [2023-02-15 11:08:52,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:52,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 11:08:52,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305979858] [2023-02-15 11:08:52,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305979858] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259434402] [2023-02-15 11:08:52,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:08:52,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:52,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:52,304 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:52,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 11:08:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:52,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 11:08:52,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 11:08:52,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-15 11:08:52,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259434402] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:52,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:52,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 16] total 40 [2023-02-15 11:08:52,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783872651] [2023-02-15 11:08:52,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:52,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 11:08:52,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:52,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 11:08:52,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 11:08:52,970 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:56,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:56,187 INFO L93 Difference]: Finished difference Result 138 states and 165 transitions. [2023-02-15 11:08:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-15 11:08:56,188 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-15 11:08:56,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:56,188 INFO L225 Difference]: With dead ends: 138 [2023-02-15 11:08:56,188 INFO L226 Difference]: Without dead ends: 109 [2023-02-15 11:08:56,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=501, Invalid=3405, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 11:08:56,190 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:56,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 140 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 11:08:56,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-15 11:08:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2023-02-15 11:08:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.168421052631579) internal successors, (111), 95 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2023-02-15 11:08:56,235 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 32 [2023-02-15 11:08:56,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:56,236 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2023-02-15 11:08:56,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2023-02-15 11:08:56,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 11:08:56,236 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:56,236 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:56,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-15 11:08:56,437 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,SelfDestructingSolverStorable23 [2023-02-15 11:08:56,437 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:56,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:56,438 INFO L85 PathProgramCache]: Analyzing trace with hash 254889333, now seen corresponding path program 20 times [2023-02-15 11:08:56,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:56,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715400898] [2023-02-15 11:08:56,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:56,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 11:08:56,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715400898] [2023-02-15 11:08:56,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715400898] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948085072] [2023-02-15 11:08:56,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:08:56,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:56,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:56,714 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:56,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 11:08:56,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:08:56,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:56,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-15 11:08:56,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 11:08:56,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 11:08:56,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948085072] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:56,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:56,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 13 [2023-02-15 11:08:56,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391306925] [2023-02-15 11:08:56,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:56,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 11:08:56,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:56,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 11:08:56,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:08:56,883 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:08:57,102 INFO L93 Difference]: Finished difference Result 152 states and 171 transitions. [2023-02-15 11:08:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 11:08:57,102 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 33 [2023-02-15 11:08:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:08:57,102 INFO L225 Difference]: With dead ends: 152 [2023-02-15 11:08:57,103 INFO L226 Difference]: Without dead ends: 139 [2023-02-15 11:08:57,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:08:57,103 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:08:57,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:08:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-15 11:08:57,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 108. [2023-02-15 11:08:57,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 107 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 127 transitions. [2023-02-15 11:08:57,155 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 127 transitions. Word has length 33 [2023-02-15 11:08:57,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:08:57,155 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 127 transitions. [2023-02-15 11:08:57,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:08:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 127 transitions. [2023-02-15 11:08:57,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 11:08:57,156 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:08:57,156 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:08:57,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-02-15 11:08:57,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:57,356 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:08:57,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:08:57,357 INFO L85 PathProgramCache]: Analyzing trace with hash -97767121, now seen corresponding path program 21 times [2023-02-15 11:08:57,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:08:57,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384016133] [2023-02-15 11:08:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:08:57,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:08:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:08:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 11:08:57,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:08:57,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384016133] [2023-02-15 11:08:57,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384016133] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:08:57,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866806044] [2023-02-15 11:08:57,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:08:57,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:08:57,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:08:57,717 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:08:57,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 11:08:57,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 11:08:57,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:08:57,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 11:08:57,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:08:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-15 11:08:58,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:08:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-15 11:08:58,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866806044] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:08:58,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:08:58,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 45 [2023-02-15 11:08:58,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387198846] [2023-02-15 11:08:58,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:08:58,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 11:08:58,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:08:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 11:08:58,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1799, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 11:08:58,575 INFO L87 Difference]: Start difference. First operand 108 states and 127 transitions. Second operand has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2023-02-15 11:09:08,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:09:08,619 INFO L93 Difference]: Finished difference Result 187 states and 225 transitions. [2023-02-15 11:09:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-02-15 11:09:08,619 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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 34 [2023-02-15 11:09:08,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:09:08,620 INFO L225 Difference]: With dead ends: 187 [2023-02-15 11:09:08,620 INFO L226 Difference]: Without dead ends: 148 [2023-02-15 11:09:08,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=989, Invalid=9723, Unknown=0, NotChecked=0, Total=10712 [2023-02-15 11:09:08,623 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 75 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:09:08,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 213 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-15 11:09:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-15 11:09:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 133. [2023-02-15 11:09:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.1515151515151516) internal successors, (152), 132 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) [2023-02-15 11:09:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2023-02-15 11:09:08,694 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 34 [2023-02-15 11:09:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:09:08,695 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2023-02-15 11:09:08,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2023-02-15 11:09:08,695 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2023-02-15 11:09:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 11:09:08,696 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:09:08,696 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:09:08,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 11:09:08,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:09:08,901 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:09:08,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:09:08,902 INFO L85 PathProgramCache]: Analyzing trace with hash -638809665, now seen corresponding path program 22 times [2023-02-15 11:09:08,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:09:08,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548226987] [2023-02-15 11:09:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:09:08,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:09:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:09:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 11:09:09,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:09:09,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548226987] [2023-02-15 11:09:09,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548226987] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:09:09,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062805351] [2023-02-15 11:09:09,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:09:09,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:09:09,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:09:09,226 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:09:09,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 11:09:09,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:09:09,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:09:09,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 11:09:09,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:09:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 11:09:09,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:09:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 11:09:09,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062805351] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:09:09,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:09:09,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2023-02-15 11:09:09,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696899728] [2023-02-15 11:09:09,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:09:09,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 11:09:09,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:09:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 11:09:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:09:09,386 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:09:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:09:09,620 INFO L93 Difference]: Finished difference Result 186 states and 206 transitions. [2023-02-15 11:09:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 11:09:09,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-15 11:09:09,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:09:09,621 INFO L225 Difference]: With dead ends: 186 [2023-02-15 11:09:09,621 INFO L226 Difference]: Without dead ends: 172 [2023-02-15 11:09:09,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-02-15 11:09:09,622 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:09:09,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 182 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:09:09,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-02-15 11:09:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 144. [2023-02-15 11:09:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 143 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) [2023-02-15 11:09:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 165 transitions. [2023-02-15 11:09:09,684 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 165 transitions. Word has length 36 [2023-02-15 11:09:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:09:09,684 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 165 transitions. [2023-02-15 11:09:09,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:09:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 165 transitions. [2023-02-15 11:09:09,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 11:09:09,685 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:09:09,685 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:09:09,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-15 11:09:09,889 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,SelfDestructingSolverStorable26 [2023-02-15 11:09:09,889 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:09:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:09:09,889 INFO L85 PathProgramCache]: Analyzing trace with hash 843931363, now seen corresponding path program 23 times [2023-02-15 11:09:09,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:09:09,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494830026] [2023-02-15 11:09:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:09:09,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:09:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:09:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 11:09:10,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:09:10,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494830026] [2023-02-15 11:09:10,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494830026] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:09:10,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691208196] [2023-02-15 11:09:10,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:09:10,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:09:10,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:09:10,312 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:09:10,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 11:09:11,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-15 11:09:11,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:09:11,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-15 11:09:11,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:09:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 11:09:11,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:09:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 11:09:12,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691208196] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:09:12,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:09:12,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 20] total 50 [2023-02-15 11:09:12,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47676422] [2023-02-15 11:09:12,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:09:12,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 11:09:12,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:09:12,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 11:09:12,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2147, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 11:09:12,237 INFO L87 Difference]: Start difference. First operand 144 states and 165 transitions. Second operand has 50 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:09:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:09:24,078 INFO L93 Difference]: Finished difference Result 212 states and 248 transitions. [2023-02-15 11:09:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-02-15 11:09:24,079 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-15 11:09:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:09:24,079 INFO L225 Difference]: With dead ends: 212 [2023-02-15 11:09:24,079 INFO L226 Difference]: Without dead ends: 173 [2023-02-15 11:09:24,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1045, Invalid=8855, Unknown=0, NotChecked=0, Total=9900 [2023-02-15 11:09:24,082 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 11:09:24,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 295 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 11:09:24,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-15 11:09:24,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 157. [2023-02-15 11:09:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1346153846153846) internal successors, (177), 156 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:09:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 177 transitions. [2023-02-15 11:09:24,159 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 177 transitions. Word has length 37 [2023-02-15 11:09:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:09:24,159 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 177 transitions. [2023-02-15 11:09:24,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:09:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 177 transitions. [2023-02-15 11:09:24,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-15 11:09:24,160 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:09:24,160 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:09:24,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-15 11:09:24,365 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,SelfDestructingSolverStorable27 [2023-02-15 11:09:24,365 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:09:24,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:09:24,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2123930255, now seen corresponding path program 24 times [2023-02-15 11:09:24,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:09:24,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205220221] [2023-02-15 11:09:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:09:24,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:09:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:09:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 11:09:24,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:09:24,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205220221] [2023-02-15 11:09:24,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205220221] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:09:24,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100514487] [2023-02-15 11:09:24,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:09:24,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:09:24,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:09:24,817 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:09:24,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-15 11:09:24,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 11:09:24,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:09:24,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-15 11:09:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:09:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:09:25,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:09:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-15 11:09:25,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100514487] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:09:25,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:09:25,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 20] total 52 [2023-02-15 11:09:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009367618] [2023-02-15 11:09:25,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:09:25,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 11:09:25,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:09:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 11:09:25,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=2123, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 11:09:25,838 INFO L87 Difference]: Start difference. First operand 157 states and 177 transitions. Second operand has 52 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 52 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:09:33,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:09:33,719 INFO L93 Difference]: Finished difference Result 388 states and 442 transitions. [2023-02-15 11:09:33,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-02-15 11:09:33,719 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 52 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-15 11:09:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:09:33,720 INFO L225 Difference]: With dead ends: 388 [2023-02-15 11:09:33,720 INFO L226 Difference]: Without dead ends: 346 [2023-02-15 11:09:33,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4885 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=3631, Invalid=11131, Unknown=0, NotChecked=0, Total=14762 [2023-02-15 11:09:33,721 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 475 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 11:09:33,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 267 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 11:09:33,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-02-15 11:09:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 157. [2023-02-15 11:09:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1602564102564104) internal successors, (181), 156 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) [2023-02-15 11:09:33,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 181 transitions. [2023-02-15 11:09:33,804 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 181 transitions. Word has length 38 [2023-02-15 11:09:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:09:33,804 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 181 transitions. [2023-02-15 11:09:33,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 52 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:09:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 181 transitions. [2023-02-15 11:09:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 11:09:33,805 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:09:33,805 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:09:33,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-02-15 11:09:34,005 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,SelfDestructingSolverStorable28 [2023-02-15 11:09:34,006 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:09:34,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:09:34,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1220951349, now seen corresponding path program 25 times [2023-02-15 11:09:34,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:09:34,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149702089] [2023-02-15 11:09:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:09:34,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:09:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:09:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-15 11:09:34,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:09:34,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149702089] [2023-02-15 11:09:34,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149702089] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:09:34,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056510068] [2023-02-15 11:09:34,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:09:34,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:09:34,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:09:34,345 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:09:34,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-15 11:09:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:09:34,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 11:09:34,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:09:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-15 11:09:34,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:09:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-15 11:09:34,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056510068] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:09:34,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:09:34,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 15 [2023-02-15 11:09:34,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263627224] [2023-02-15 11:09:34,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:09:34,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 11:09:34,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:09:34,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 11:09:34,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-02-15 11:09:34,497 INFO L87 Difference]: Start difference. First operand 157 states and 181 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:09:34,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:09:34,881 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2023-02-15 11:09:34,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 11:09:34,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 39 [2023-02-15 11:09:34,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:09:34,883 INFO L225 Difference]: With dead ends: 225 [2023-02-15 11:09:34,883 INFO L226 Difference]: Without dead ends: 210 [2023-02-15 11:09:34,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2023-02-15 11:09:34,884 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:09:34,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 214 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:09:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-02-15 11:09:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 176. [2023-02-15 11:09:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.16) internal successors, (203), 175 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:09:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 203 transitions. [2023-02-15 11:09:34,994 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 203 transitions. Word has length 39 [2023-02-15 11:09:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:09:34,994 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 203 transitions. [2023-02-15 11:09:34,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:09:34,994 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 203 transitions. [2023-02-15 11:09:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 11:09:34,995 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:09:34,995 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:09:34,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-02-15 11:09:35,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:09:35,195 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:09:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:09:35,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2014510676, now seen corresponding path program 26 times [2023-02-15 11:09:35,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:09:35,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937131986] [2023-02-15 11:09:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:09:35,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:09:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:09:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-15 11:09:35,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:09:35,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937131986] [2023-02-15 11:09:35,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937131986] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:09:35,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481748660] [2023-02-15 11:09:35,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:09:35,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:09:35,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:09:35,652 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:09:35,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-15 11:09:35,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:09:35,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:09:35,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-15 11:09:35,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:09:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-15 11:09:35,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:09:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 11:09:36,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481748660] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:09:36,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:09:36,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 22] total 56 [2023-02-15 11:09:36,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140859586] [2023-02-15 11:09:36,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:09:36,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-15 11:09:36,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:09:36,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-15 11:09:36,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=2720, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 11:09:36,673 INFO L87 Difference]: Start difference. First operand 176 states and 203 transitions. Second operand has 56 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:10:00,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:10:00,054 INFO L93 Difference]: Finished difference Result 271 states and 323 transitions. [2023-02-15 11:10:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-02-15 11:10:00,055 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-02-15 11:10:00,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:10:00,056 INFO L225 Difference]: With dead ends: 271 [2023-02-15 11:10:00,056 INFO L226 Difference]: Without dead ends: 216 [2023-02-15 11:10:00,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=1508, Invalid=14748, Unknown=0, NotChecked=0, Total=16256 [2023-02-15 11:10:00,057 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 2398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:10:00,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 293 Invalid, 2398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-02-15 11:10:00,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-02-15 11:10:00,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 199. [2023-02-15 11:10:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.1414141414141414) internal successors, (226), 198 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:10:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 226 transitions. [2023-02-15 11:10:00,183 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 226 transitions. Word has length 41 [2023-02-15 11:10:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:10:00,183 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 226 transitions. [2023-02-15 11:10:00,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:10:00,184 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 226 transitions. [2023-02-15 11:10:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 11:10:00,184 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:10:00,185 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:10:00,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-02-15 11:10:00,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:10:00,386 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:10:00,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:10:00,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1735291263, now seen corresponding path program 27 times [2023-02-15 11:10:00,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:10:00,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468426045] [2023-02-15 11:10:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:10:00,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:10:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:10:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 11:10:00,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:10:00,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468426045] [2023-02-15 11:10:00,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468426045] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:10:00,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120123059] [2023-02-15 11:10:00,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:10:00,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:10:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:10:00,751 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:10:00,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-15 11:10:01,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-15 11:10:01,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:10:01,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 11:10:01,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:10:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 27 proven. 135 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 11:10:01,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:10:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 11:10:01,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120123059] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:10:01,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:10:01,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 15] total 19 [2023-02-15 11:10:01,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35128671] [2023-02-15 11:10:01,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:10:01,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 11:10:01,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:10:01,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 11:10:01,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-02-15 11:10:01,482 INFO L87 Difference]: Start difference. First operand 199 states and 226 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 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) [2023-02-15 11:10:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:10:01,987 INFO L93 Difference]: Finished difference Result 287 states and 321 transitions. [2023-02-15 11:10:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 11:10:01,987 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 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) Word has length 42 [2023-02-15 11:10:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:10:01,988 INFO L225 Difference]: With dead ends: 287 [2023-02-15 11:10:01,988 INFO L226 Difference]: Without dead ends: 271 [2023-02-15 11:10:01,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-02-15 11:10:01,988 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:10:01,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 254 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:10:01,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-02-15 11:10:02,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 218. [2023-02-15 11:10:02,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.1428571428571428) internal successors, (248), 217 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) [2023-02-15 11:10:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 248 transitions. [2023-02-15 11:10:02,115 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 248 transitions. Word has length 42 [2023-02-15 11:10:02,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:10:02,115 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 248 transitions. [2023-02-15 11:10:02,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 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) [2023-02-15 11:10:02,115 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 248 transitions. [2023-02-15 11:10:02,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 11:10:02,116 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:10:02,116 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:10:02,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-15 11:10:02,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:10:02,316 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:10:02,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:10:02,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1162830530, now seen corresponding path program 28 times [2023-02-15 11:10:02,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:10:02,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315920986] [2023-02-15 11:10:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:10:02,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:10:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:10:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 11:10:02,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:10:02,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315920986] [2023-02-15 11:10:02,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315920986] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:10:02,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170012014] [2023-02-15 11:10:02,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:10:02,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:10:02,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:10:02,805 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:10:02,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-15 11:10:02,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:10:02,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:10:02,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-15 11:10:02,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:10:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:10:03,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:10:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-15 11:10:03,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170012014] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:10:03,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:10:03,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 22] total 58 [2023-02-15 11:10:03,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309568295] [2023-02-15 11:10:03,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:10:03,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-15 11:10:03,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:10:03,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-15 11:10:03,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=2658, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 11:10:03,864 INFO L87 Difference]: Start difference. First operand 218 states and 248 transitions. Second operand has 58 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 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) [2023-02-15 11:10:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:10:16,938 INFO L93 Difference]: Finished difference Result 540 states and 621 transitions. [2023-02-15 11:10:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2023-02-15 11:10:16,939 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-15 11:10:16,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:10:16,940 INFO L225 Difference]: With dead ends: 540 [2023-02-15 11:10:16,941 INFO L226 Difference]: Without dead ends: 496 [2023-02-15 11:10:16,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7714 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=5389, Invalid=16367, Unknown=0, NotChecked=0, Total=21756 [2023-02-15 11:10:16,943 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 846 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 2000 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:10:16,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 315 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2000 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 11:10:16,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-02-15 11:10:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 209. [2023-02-15 11:10:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.1490384615384615) internal successors, (239), 208 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) [2023-02-15 11:10:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 239 transitions. [2023-02-15 11:10:17,096 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 239 transitions. Word has length 42 [2023-02-15 11:10:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:10:17,096 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 239 transitions. [2023-02-15 11:10:17,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 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) [2023-02-15 11:10:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 239 transitions. [2023-02-15 11:10:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 11:10:17,097 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:10:17,097 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:10:17,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-15 11:10:17,303 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,SelfDestructingSolverStorable32 [2023-02-15 11:10:17,303 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:10:17,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:10:17,303 INFO L85 PathProgramCache]: Analyzing trace with hash 838293237, now seen corresponding path program 29 times [2023-02-15 11:10:17,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:10:17,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24486895] [2023-02-15 11:10:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:10:17,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:10:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:10:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 66 proven. 110 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-02-15 11:10:17,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:10:17,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24486895] [2023-02-15 11:10:17,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24486895] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:10:17,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691422145] [2023-02-15 11:10:17,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:10:17,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:10:17,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:10:17,712 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:10:17,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-15 11:10:20,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-15 11:10:20,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:10:20,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-15 11:10:20,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:10:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 66 proven. 110 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-02-15 11:10:20,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:10:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 66 proven. 110 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-02-15 11:10:21,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691422145] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:10:21,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:10:21,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 57 [2023-02-15 11:10:21,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291133272] [2023-02-15 11:10:21,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:10:21,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-15 11:10:21,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:10:21,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-15 11:10:21,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=2696, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 11:10:21,118 INFO L87 Difference]: Start difference. First operand 209 states and 239 transitions. Second operand has 57 states, 57 states have (on average 1.263157894736842) internal successors, (72), 57 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:10:28,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:10:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:10:45,137 INFO L93 Difference]: Finished difference Result 491 states and 539 transitions. [2023-02-15 11:10:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-02-15 11:10:45,138 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.263157894736842) internal successors, (72), 57 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 45 [2023-02-15 11:10:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:10:45,139 INFO L225 Difference]: With dead ends: 491 [2023-02-15 11:10:45,139 INFO L226 Difference]: Without dead ends: 458 [2023-02-15 11:10:45,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=2476, Invalid=9956, Unknown=0, NotChecked=0, Total=12432 [2023-02-15 11:10:45,141 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 257 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-02-15 11:10:45,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 240 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-02-15 11:10:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2023-02-15 11:10:45,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 174. [2023-02-15 11:10:45,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.1560693641618498) internal successors, (200), 173 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) [2023-02-15 11:10:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 200 transitions. [2023-02-15 11:10:45,267 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 200 transitions. Word has length 45 [2023-02-15 11:10:45,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:10:45,267 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 200 transitions. [2023-02-15 11:10:45,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.263157894736842) internal successors, (72), 57 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:10:45,267 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 200 transitions. [2023-02-15 11:10:45,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 11:10:45,267 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:10:45,267 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:10:45,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-02-15 11:10:45,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:10:45,468 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:10:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:10:45,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1833254133, now seen corresponding path program 30 times [2023-02-15 11:10:45,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:10:45,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305864772] [2023-02-15 11:10:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:10:45,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:10:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:10:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-15 11:10:45,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:10:45,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305864772] [2023-02-15 11:10:45,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305864772] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:10:45,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578977776] [2023-02-15 11:10:45,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:10:45,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:10:45,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:10:45,861 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:10:45,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-15 11:10:46,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 11:10:46,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:10:46,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-15 11:10:46,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:10:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-15 11:10:46,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:10:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-15 11:10:46,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578977776] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:10:46,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:10:46,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 17 [2023-02-15 11:10:46,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677643183] [2023-02-15 11:10:46,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:10:46,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 11:10:46,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:10:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 11:10:46,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2023-02-15 11:10:46,501 INFO L87 Difference]: Start difference. First operand 174 states and 200 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) [2023-02-15 11:10:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:10:46,983 INFO L93 Difference]: Finished difference Result 274 states and 303 transitions. [2023-02-15 11:10:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 11:10:46,983 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 45 [2023-02-15 11:10:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:10:46,984 INFO L225 Difference]: With dead ends: 274 [2023-02-15 11:10:46,984 INFO L226 Difference]: Without dead ends: 257 [2023-02-15 11:10:46,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2023-02-15 11:10:46,985 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:10:46,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 303 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:10:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-02-15 11:10:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 195. [2023-02-15 11:10:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.1546391752577319) internal successors, (224), 194 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:10:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 224 transitions. [2023-02-15 11:10:47,122 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 224 transitions. Word has length 45 [2023-02-15 11:10:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:10:47,122 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 224 transitions. [2023-02-15 11:10:47,122 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) [2023-02-15 11:10:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 224 transitions. [2023-02-15 11:10:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 11:10:47,123 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:10:47,123 INFO L195 NwaCegarLoop]: trace histogram [15, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:10:47,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-15 11:10:47,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:10:47,325 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:10:47,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:10:47,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2010646845, now seen corresponding path program 31 times [2023-02-15 11:10:47,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:10:47,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467113753] [2023-02-15 11:10:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:10:47,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:10:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:10:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 11:10:47,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:10:47,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467113753] [2023-02-15 11:10:47,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467113753] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:10:47,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268154978] [2023-02-15 11:10:47,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:10:47,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:10:47,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:10:47,881 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:10:47,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-15 11:10:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:10:47,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-15 11:10:47,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:10:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 11:10:48,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:10:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-15 11:10:49,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268154978] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:10:49,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:10:49,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 24] total 62 [2023-02-15 11:10:49,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256933939] [2023-02-15 11:10:49,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:10:49,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-15 11:10:49,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:10:49,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-15 11:10:49,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=3361, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 11:10:49,090 INFO L87 Difference]: Start difference. First operand 195 states and 224 transitions. Second operand has 62 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 62 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) [2023-02-15 11:11:42,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:11:42,180 INFO L93 Difference]: Finished difference Result 311 states and 368 transitions. [2023-02-15 11:11:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-02-15 11:11:42,180 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-15 11:11:42,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:11:42,182 INFO L225 Difference]: With dead ends: 311 [2023-02-15 11:11:42,182 INFO L226 Difference]: Without dead ends: 249 [2023-02-15 11:11:42,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5757 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=1970, Invalid=21286, Unknown=0, NotChecked=0, Total=23256 [2023-02-15 11:11:42,183 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:11:42,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 314 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-02-15 11:11:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-02-15 11:11:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 229. [2023-02-15 11:11:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.1359649122807018) internal successors, (259), 228 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:11:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 259 transitions. [2023-02-15 11:11:42,399 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 259 transitions. Word has length 45 [2023-02-15 11:11:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:11:42,399 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 259 transitions. [2023-02-15 11:11:42,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 62 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) [2023-02-15 11:11:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 259 transitions. [2023-02-15 11:11:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 11:11:42,400 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:11:42,400 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:11:42,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-02-15 11:11:42,605 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,SelfDestructingSolverStorable35 [2023-02-15 11:11:42,605 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:11:42,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:11:42,606 INFO L85 PathProgramCache]: Analyzing trace with hash 166365503, now seen corresponding path program 32 times [2023-02-15 11:11:42,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:11:42,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777327733] [2023-02-15 11:11:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:42,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:11:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:11:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 11:11:43,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:11:43,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777327733] [2023-02-15 11:11:43,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777327733] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:11:43,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364650761] [2023-02-15 11:11:43,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:11:43,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:11:43,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:11:43,042 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:11:43,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-15 11:11:43,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:11:43,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:11:43,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-15 11:11:43,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:11:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 11:11:43,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:11:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 11:11:43,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364650761] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:11:43,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:11:43,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 18 [2023-02-15 11:11:43,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053629539] [2023-02-15 11:11:43,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:11:43,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 11:11:43,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:11:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 11:11:43,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2023-02-15 11:11:43,219 INFO L87 Difference]: Start difference. First operand 229 states and 259 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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) [2023-02-15 11:11:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:11:43,723 INFO L93 Difference]: Finished difference Result 301 states and 331 transitions. [2023-02-15 11:11:43,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 11:11:43,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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) Word has length 48 [2023-02-15 11:11:43,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:11:43,724 INFO L225 Difference]: With dead ends: 301 [2023-02-15 11:11:43,724 INFO L226 Difference]: Without dead ends: 283 [2023-02-15 11:11:43,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2023-02-15 11:11:43,725 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:11:43,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 349 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:11:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-02-15 11:11:43,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 250. [2023-02-15 11:11:43,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.1365461847389557) internal successors, (283), 249 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:11:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 283 transitions. [2023-02-15 11:11:43,916 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 283 transitions. Word has length 48 [2023-02-15 11:11:43,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:11:43,916 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 283 transitions. [2023-02-15 11:11:43,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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) [2023-02-15 11:11:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 283 transitions. [2023-02-15 11:11:43,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 11:11:43,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:11:43,917 INFO L195 NwaCegarLoop]: trace histogram [16, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:11:43,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-02-15 11:11:44,117 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,SelfDestructingSolverStorable36 [2023-02-15 11:11:44,118 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:11:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:11:44,118 INFO L85 PathProgramCache]: Analyzing trace with hash -945996337, now seen corresponding path program 33 times [2023-02-15 11:11:44,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:11:44,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920522300] [2023-02-15 11:11:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:44,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:11:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:11:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-15 11:11:44,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:11:44,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920522300] [2023-02-15 11:11:44,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920522300] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:11:44,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779631759] [2023-02-15 11:11:44,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:11:44,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:11:44,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:11:44,765 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:11:44,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-15 11:11:45,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-15 11:11:45,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:11:45,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 11:11:45,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:11:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-15 11:11:45,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:11:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-15 11:11:47,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779631759] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:11:47,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:11:47,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 27] total 81 [2023-02-15 11:11:47,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585497422] [2023-02-15 11:11:47,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:11:47,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-15 11:11:47,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:11:47,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-15 11:11:47,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1171, Invalid=5309, Unknown=0, NotChecked=0, Total=6480 [2023-02-15 11:11:47,436 INFO L87 Difference]: Start difference. First operand 250 states and 283 transitions. Second operand has 81 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:12:04,504 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)