./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/seq-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/seq-3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:04:52,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:04:52,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:04:52,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:04:52,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:04:52,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:04:52,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:04:52,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:04:52,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:04:52,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:04:52,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:04:52,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:04:52,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:04:52,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:04:52,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:04:52,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:04:52,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:04:52,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:04:52,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:04:52,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:04:52,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:04:52,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:04:52,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:04:52,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:04:52,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:04:52,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:04:52,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:04:52,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:04:52,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:04:52,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:04:52,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:04:52,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:04:52,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:04:52,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:04:52,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:04:52,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:04:52,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:04:52,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:04:52,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:04:52,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:04:52,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:04:52,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:04:52,580 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:04:52,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:04:52,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:04:52,581 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:04:52,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:04:52,582 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:04:52,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:04:52,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:04:52,583 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:04:52,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:04:52,584 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:04:52,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:04:52,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:04:52,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:04:52,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:04:52,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:04:52,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:04:52,585 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:04:52,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:04:52,585 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:04:52,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:04:52,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:04:52,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:04:52,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:04:52,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:04:52,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:04:52,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:04:52,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:04:52,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:04:52,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:04:52,587 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:04:52,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:04:52,587 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:04:52,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:04:52,587 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:04:52,587 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 [2023-02-15 20:04:52,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:04:52,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:04:52,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:04:52,821 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:04:52,821 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:04:52,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/seq-3.i [2023-02-15 20:04:53,887 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:04:54,028 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:04:54,029 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/seq-3.i [2023-02-15 20:04:54,033 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4ea896fd/a20229120c4148c7b04a5ceb84745d5f/FLAGac81dae2a [2023-02-15 20:04:54,456 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4ea896fd/a20229120c4148c7b04a5ceb84745d5f [2023-02-15 20:04:54,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:04:54,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:04:54,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:04:54,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:04:54,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:04:54,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:04:54" (1/1) ... [2023-02-15 20:04:54,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b64144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54, skipping insertion in model container [2023-02-15 20:04:54,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:04:54" (1/1) ... [2023-02-15 20:04:54,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:04:54,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:04:54,582 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2023-02-15 20:04:54,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:04:54,602 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:04:54,611 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2023-02-15 20:04:54,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:04:54,628 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:04:54,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54 WrapperNode [2023-02-15 20:04:54,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:04:54,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:04:54,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:04:54,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:04:54,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54" (1/1) ... [2023-02-15 20:04:54,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54" (1/1) ... [2023-02-15 20:04:54,649 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-02-15 20:04:54,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:04:54,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:04:54,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:04:54,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:04:54,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54" (1/1) ... [2023-02-15 20:04:54,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54" (1/1) ... [2023-02-15 20:04:54,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54" (1/1) ... [2023-02-15 20:04:54,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54" (1/1) ... [2023-02-15 20:04:54,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54" (1/1) ... [2023-02-15 20:04:54,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54" (1/1) ... [2023-02-15 20:04:54,675 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54" (1/1) ... [2023-02-15 20:04:54,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54" (1/1) ... [2023-02-15 20:04:54,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:04:54,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:04:54,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:04:54,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:04:54,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54" (1/1) ... [2023-02-15 20:04:54,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:04:54,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:04:54,707 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 20:04:54,733 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 20:04:54,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:04:54,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:04:54,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:04:54,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:04:54,796 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:04:54,798 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:04:54,928 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:04:54,932 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:04:54,934 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 20:04:54,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:04:54 BoogieIcfgContainer [2023-02-15 20:04:54,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:04:54,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:04:54,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:04:54,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:04:54,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:04:54" (1/3) ... [2023-02-15 20:04:54,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b245bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:04:54, skipping insertion in model container [2023-02-15 20:04:54,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:04:54" (2/3) ... [2023-02-15 20:04:54,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b245bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:04:54, skipping insertion in model container [2023-02-15 20:04:54,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:04:54" (3/3) ... [2023-02-15 20:04:54,941 INFO L112 eAbstractionObserver]: Analyzing ICFG seq-3.i [2023-02-15 20:04:54,952 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:04:54,952 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:04:54,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:04:54,993 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;@560345aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:04:54,994 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:04:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 20:04:55,001 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:04:55,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:04:55,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:04:55,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:04:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash -163175075, now seen corresponding path program 1 times [2023-02-15 20:04:55,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:04:55,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160210299] [2023-02-15 20:04:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:55,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:04:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:55,302 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 20:04:55,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:04:55,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160210299] [2023-02-15 20:04:55,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160210299] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:04:55,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:04:55,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 20:04:55,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110330799] [2023-02-15 20:04:55,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:04:55,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 20:04:55,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:04:55,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 20:04:55,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:04:55,342 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:55,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:04:55,446 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2023-02-15 20:04:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 20:04:55,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 20:04:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:04:55,475 INFO L225 Difference]: With dead ends: 48 [2023-02-15 20:04:55,475 INFO L226 Difference]: Without dead ends: 23 [2023-02-15 20:04:55,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-15 20:04:55,479 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:04:55,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 60 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:04:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-15 20:04:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2023-02-15 20:04:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-02-15 20:04:55,518 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2023-02-15 20:04:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:04:55,518 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-02-15 20:04:55,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-02-15 20:04:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 20:04:55,519 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:04:55,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:04:55,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 20:04:55,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:04:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:04:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash -712013865, now seen corresponding path program 1 times [2023-02-15 20:04:55,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:04:55,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78794947] [2023-02-15 20:04:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:55,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:04:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:55,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:04:55,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78794947] [2023-02-15 20:04:55,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78794947] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:04:55,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634174554] [2023-02-15 20:04:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:55,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:55,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:04:55,589 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 20:04:55,590 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 20:04:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:55,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 20:04:55,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:04:55,668 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 20:04:55,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:04:55,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634174554] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:04:55,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:04:55,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-02-15 20:04:55,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191248478] [2023-02-15 20:04:55,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:04:55,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:04:55,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:04:55,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:04:55,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:04:55,671 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:55,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:04:55,697 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-02-15 20:04:55,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:04:55,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 20:04:55,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:04:55,698 INFO L225 Difference]: With dead ends: 26 [2023-02-15 20:04:55,698 INFO L226 Difference]: Without dead ends: 24 [2023-02-15 20:04:55,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:04:55,699 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:04:55,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:04:55,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-15 20:04:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2023-02-15 20:04:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-02-15 20:04:55,703 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2023-02-15 20:04:55,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:04:55,703 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-02-15 20:04:55,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-02-15 20:04:55,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 20:04:55,704 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:04:55,704 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:04:55,711 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 20:04:55,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:55,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:04:55,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:04:55,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1243265849, now seen corresponding path program 1 times [2023-02-15 20:04:55,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:04:55,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054289301] [2023-02-15 20:04:55,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:55,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:04:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:56,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:04:56,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054289301] [2023-02-15 20:04:56,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054289301] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:04:56,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301932732] [2023-02-15 20:04:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:56,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:56,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:04:56,007 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 20:04:56,009 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 20:04:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:56,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 20:04:56,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:04:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:56,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:04:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:56,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301932732] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:04:56,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:04:56,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-15 20:04:56,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502018386] [2023-02-15 20:04:56,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:04:56,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 20:04:56,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:04:56,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 20:04:56,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:04:56,192 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:04:56,302 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-02-15 20:04:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 20:04:56,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 20:04:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:04:56,305 INFO L225 Difference]: With dead ends: 38 [2023-02-15 20:04:56,305 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 20:04:56,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2023-02-15 20:04:56,309 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:04:56,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 100 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:04:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 20:04:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2023-02-15 20:04:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-02-15 20:04:56,313 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2023-02-15 20:04:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:04:56,314 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-02-15 20:04:56,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-02-15 20:04:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 20:04:56,314 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:04:56,314 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:04:56,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 20:04:56,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 20:04:56,519 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:04:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:04:56,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2084334856, now seen corresponding path program 1 times [2023-02-15 20:04:56,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:04:56,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557837038] [2023-02-15 20:04:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:56,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:04:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:56,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:04:56,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557837038] [2023-02-15 20:04:56,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557837038] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:04:56,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235930924] [2023-02-15 20:04:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:56,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:56,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:04:56,593 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 20:04:56,595 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 20:04:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:56,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 20:04:56,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:04:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:56,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:04:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:56,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235930924] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:04:56,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:04:56,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-15 20:04:56,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855838877] [2023-02-15 20:04:56,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:04:56,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 20:04:56,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:04:56,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 20:04:56,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-02-15 20:04:56,748 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:56,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:04:56,831 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2023-02-15 20:04:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 20:04:56,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 20:04:56,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:04:56,832 INFO L225 Difference]: With dead ends: 50 [2023-02-15 20:04:56,832 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 20:04:56,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2023-02-15 20:04:56,833 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:04:56,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 60 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:04:56,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 20:04:56,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 21. [2023-02-15 20:04:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-15 20:04:56,836 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2023-02-15 20:04:56,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:04:56,837 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-15 20:04:56,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:56,837 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-15 20:04:56,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 20:04:56,837 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:04:56,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:04:56,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 20:04:57,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:57,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:04:57,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:04:57,043 INFO L85 PathProgramCache]: Analyzing trace with hash -929410893, now seen corresponding path program 2 times [2023-02-15 20:04:57,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:04:57,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894110120] [2023-02-15 20:04:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:57,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:04:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:57,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:04:57,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894110120] [2023-02-15 20:04:57,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894110120] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:04:57,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459660445] [2023-02-15 20:04:57,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:04:57,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:57,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:04:57,092 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 20:04:57,094 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 20:04:57,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:04:57,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:04:57,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 20:04:57,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:04:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:57,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:04:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:57,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459660445] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:04:57,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:04:57,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-02-15 20:04:57,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628485512] [2023-02-15 20:04:57,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:04:57,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 20:04:57,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:04:57,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 20:04:57,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-15 20:04:57,191 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 20:04:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:04:57,235 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-02-15 20:04:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 20:04:57,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 16 [2023-02-15 20:04:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:04:57,236 INFO L225 Difference]: With dead ends: 32 [2023-02-15 20:04:57,236 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 20:04:57,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:04:57,237 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:04:57,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 61 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:04:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 20:04:57,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2023-02-15 20:04:57,243 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 20:04:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-15 20:04:57,243 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2023-02-15 20:04:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:04:57,243 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-15 20:04:57,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 20:04:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-15 20:04:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 20:04:57,244 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:04:57,244 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:04:57,249 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 20:04:57,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:57,450 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:04:57,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:04:57,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1579087069, now seen corresponding path program 3 times [2023-02-15 20:04:57,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:04:57,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955173878] [2023-02-15 20:04:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:57,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:04:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:57,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:04:57,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955173878] [2023-02-15 20:04:57,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955173878] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:04:57,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343841597] [2023-02-15 20:04:57,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:04:57,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:57,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:04:57,536 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 20:04:57,538 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 20:04:57,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:04:57,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:04:57,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 20:04:57,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:04:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:57,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:04:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:57,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343841597] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:04:57,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:04:57,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-02-15 20:04:57,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032846944] [2023-02-15 20:04:57,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:04:57,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 20:04:57,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:04:57,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 20:04:57,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:04:57,770 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:04:57,896 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2023-02-15 20:04:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 20:04:57,896 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 20:04:57,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:04:57,897 INFO L225 Difference]: With dead ends: 51 [2023-02-15 20:04:57,897 INFO L226 Difference]: Without dead ends: 38 [2023-02-15 20:04:57,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2023-02-15 20:04:57,898 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:04:57,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 90 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:04:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-15 20:04:57,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2023-02-15 20:04:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-02-15 20:04:57,902 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2023-02-15 20:04:57,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:04:57,902 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-02-15 20:04:57,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:57,902 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-02-15 20:04:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 20:04:57,903 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:04:57,903 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:04:57,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 20:04:58,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:58,107 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:04:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:04:58,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1678234908, now seen corresponding path program 1 times [2023-02-15 20:04:58,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:04:58,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942951861] [2023-02-15 20:04:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:58,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:04:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:58,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:04:58,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942951861] [2023-02-15 20:04:58,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942951861] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:04:58,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729915602] [2023-02-15 20:04:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:58,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:58,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:04:58,210 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 20:04:58,211 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 20:04:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:58,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 20:04:58,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:04:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:58,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:04:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:58,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729915602] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:04:58,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:04:58,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-02-15 20:04:58,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535915541] [2023-02-15 20:04:58,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:04:58,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 20:04:58,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:04:58,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 20:04:58,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-02-15 20:04:58,426 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:04:58,575 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2023-02-15 20:04:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 20:04:58,575 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 20:04:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:04:58,576 INFO L225 Difference]: With dead ends: 64 [2023-02-15 20:04:58,576 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 20:04:58,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2023-02-15 20:04:58,577 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:04:58,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 102 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:04:58,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 20:04:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 25. [2023-02-15 20:04:58,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-02-15 20:04:58,581 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2023-02-15 20:04:58,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:04:58,581 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-02-15 20:04:58,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:58,581 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-02-15 20:04:58,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 20:04:58,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:04:58,582 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:04:58,586 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 20:04:58,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:58,786 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:04:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:04:58,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1265791229, now seen corresponding path program 2 times [2023-02-15 20:04:58,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:04:58,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828898192] [2023-02-15 20:04:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:58,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:04:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:58,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:04:58,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828898192] [2023-02-15 20:04:58,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828898192] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:04:58,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077554332] [2023-02-15 20:04:58,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:04:58,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:58,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:04:58,876 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 20:04:58,897 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 20:04:58,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:04:58,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:04:58,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 20:04:58,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:04:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:59,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:04:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:59,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077554332] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:04:59,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:04:59,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-02-15 20:04:59,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457027975] [2023-02-15 20:04:59,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:04:59,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 20:04:59,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:04:59,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 20:04:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-02-15 20:04:59,095 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:59,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:04:59,228 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2023-02-15 20:04:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 20:04:59,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 20:04:59,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:04:59,229 INFO L225 Difference]: With dead ends: 79 [2023-02-15 20:04:59,229 INFO L226 Difference]: Without dead ends: 66 [2023-02-15 20:04:59,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2023-02-15 20:04:59,230 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:04:59,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 106 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:04:59,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-15 20:04:59,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 27. [2023-02-15 20:04:59,234 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 20:04:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-02-15 20:04:59,234 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2023-02-15 20:04:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:04:59,234 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-02-15 20:04:59,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:59,235 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-02-15 20:04:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 20:04:59,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:04:59,235 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:04:59,253 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 20:04:59,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:59,440 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:04:59,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:04:59,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1081918121, now seen corresponding path program 4 times [2023-02-15 20:04:59,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:04:59,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63410821] [2023-02-15 20:04:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:59,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:04:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:59,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:04:59,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63410821] [2023-02-15 20:04:59,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63410821] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:04:59,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764307063] [2023-02-15 20:04:59,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:04:59,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:59,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:04:59,488 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 20:04:59,490 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 20:04:59,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:04:59,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:04:59,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 20:04:59,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:04:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:59,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:04:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:59,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764307063] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:04:59,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:04:59,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-02-15 20:04:59,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141418462] [2023-02-15 20:04:59,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:04:59,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 20:04:59,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:04:59,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 20:04:59,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:04:59,591 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 20:04:59,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:04:59,640 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-02-15 20:04:59,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 20:04:59,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 20 [2023-02-15 20:04:59,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:04:59,641 INFO L225 Difference]: With dead ends: 38 [2023-02-15 20:04:59,641 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 20:04:59,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:04:59,642 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:04:59,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 58 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:04:59,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 20:04:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-02-15 20:04:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:04:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-02-15 20:04:59,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2023-02-15 20:04:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:04:59,645 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-02-15 20:04:59,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 20:04:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-02-15 20:04:59,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 20:04:59,646 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:04:59,646 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:04:59,652 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 20:04:59,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-15 20:04:59,846 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:04:59,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:04:59,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1983310407, now seen corresponding path program 5 times [2023-02-15 20:04:59,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:04:59,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621615465] [2023-02-15 20:04:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:04:59,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:04:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:04:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:04:59,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:04:59,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621615465] [2023-02-15 20:04:59,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621615465] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:04:59,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280691723] [2023-02-15 20:04:59,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:04:59,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:04:59,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:04:59,951 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 20:04:59,976 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 20:04:59,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 20:04:59,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:04:59,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 20:04:59,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:00,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:00,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280691723] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:00,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:00,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 20:05:00,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596834082] [2023-02-15 20:05:00,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:00,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 20:05:00,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:00,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 20:05:00,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-02-15 20:05:00,212 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:00,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:00,342 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2023-02-15 20:05:00,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 20:05:00,342 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 20:05:00,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:00,343 INFO L225 Difference]: With dead ends: 64 [2023-02-15 20:05:00,343 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 20:05:00,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 20:05:00,343 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:00,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 121 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:05:00,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 20:05:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2023-02-15 20:05:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-02-15 20:05:00,348 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2023-02-15 20:05:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:00,348 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-02-15 20:05:00,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-02-15 20:05:00,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 20:05:00,348 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:00,349 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:00,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-15 20:05:00,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 20:05:00,553 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:00,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:00,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1279672712, now seen corresponding path program 2 times [2023-02-15 20:05:00,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:00,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350987038] [2023-02-15 20:05:00,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:00,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:00,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:00,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350987038] [2023-02-15 20:05:00,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350987038] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:00,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506556922] [2023-02-15 20:05:00,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:05:00,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:00,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:00,642 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 20:05:00,686 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 20:05:00,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:05:00,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:00,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 20:05:00,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:00,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:00,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506556922] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:00,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:00,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-02-15 20:05:00,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676889382] [2023-02-15 20:05:00,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:00,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 20:05:00,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:00,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 20:05:00,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-02-15 20:05:00,908 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:01,065 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2023-02-15 20:05:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 20:05:01,065 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 20:05:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:01,066 INFO L225 Difference]: With dead ends: 81 [2023-02-15 20:05:01,066 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 20:05:01,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 20:05:01,067 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:01,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 133 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 20:05:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 31. [2023-02-15 20:05:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-02-15 20:05:01,071 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2023-02-15 20:05:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:01,071 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-02-15 20:05:01,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-02-15 20:05:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 20:05:01,072 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:01,072 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:01,076 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 20:05:01,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 20:05:01,272 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1791066585, now seen corresponding path program 3 times [2023-02-15 20:05:01,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:01,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258918994] [2023-02-15 20:05:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:01,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:01,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258918994] [2023-02-15 20:05:01,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258918994] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:01,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565345356] [2023-02-15 20:05:01,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:05:01,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:01,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:01,370 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:01,372 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 20:05:01,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 20:05:01,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:01,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 20:05:01,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:01,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:01,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565345356] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:01,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:01,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-02-15 20:05:01,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900739577] [2023-02-15 20:05:01,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:01,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 20:05:01,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:01,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 20:05:01,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-02-15 20:05:01,600 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:01,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:01,775 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2023-02-15 20:05:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 20:05:01,775 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 20:05:01,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:01,776 INFO L225 Difference]: With dead ends: 97 [2023-02-15 20:05:01,776 INFO L226 Difference]: Without dead ends: 81 [2023-02-15 20:05:01,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 20:05:01,777 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:01,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 152 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:01,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-15 20:05:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 31. [2023-02-15 20:05:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-02-15 20:05:01,782 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2023-02-15 20:05:01,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:01,782 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-02-15 20:05:01,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-02-15 20:05:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 20:05:01,783 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:01,783 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:01,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 20:05:01,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 20:05:01,987 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:01,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:01,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1712107944, now seen corresponding path program 3 times [2023-02-15 20:05:01,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:01,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727890537] [2023-02-15 20:05:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:01,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:02,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:02,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727890537] [2023-02-15 20:05:02,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727890537] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:02,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414680006] [2023-02-15 20:05:02,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:05:02,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:02,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:02,078 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 20:05:02,080 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 20:05:02,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 20:05:02,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:02,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 20:05:02,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:02,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:02,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414680006] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:02,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:02,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2023-02-15 20:05:02,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835462527] [2023-02-15 20:05:02,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:02,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 20:05:02,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:02,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 20:05:02,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:05:02,292 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:02,447 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2023-02-15 20:05:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 20:05:02,447 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 20:05:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:02,448 INFO L225 Difference]: With dead ends: 115 [2023-02-15 20:05:02,448 INFO L226 Difference]: Without dead ends: 99 [2023-02-15 20:05:02,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=933, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 20:05:02,449 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 131 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:02,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 119 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:05:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-15 20:05:02,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 33. [2023-02-15 20:05:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-02-15 20:05:02,453 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2023-02-15 20:05:02,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:02,453 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-02-15 20:05:02,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-02-15 20:05:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 20:05:02,454 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:02,454 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:02,461 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 20:05:02,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 20:05:02,659 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:02,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1769959117, now seen corresponding path program 6 times [2023-02-15 20:05:02,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:02,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215960919] [2023-02-15 20:05:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:02,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:02,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:02,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215960919] [2023-02-15 20:05:02,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215960919] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:02,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567009776] [2023-02-15 20:05:02,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:05:02,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:02,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:02,729 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 20:05:02,732 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 20:05:02,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 20:05:02,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:02,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 20:05:02,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:02,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:02,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567009776] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:02,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:02,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2023-02-15 20:05:02,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551888432] [2023-02-15 20:05:02,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:02,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:05:02,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:02,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:05:02,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:05:02,839 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 20:05:02,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:02,900 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-02-15 20:05:02,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 20:05:02,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 24 [2023-02-15 20:05:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:02,901 INFO L225 Difference]: With dead ends: 44 [2023-02-15 20:05:02,902 INFO L226 Difference]: Without dead ends: 42 [2023-02-15 20:05:02,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2023-02-15 20:05:02,902 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:02,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:05:02,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-15 20:05:02,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2023-02-15 20:05:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-02-15 20:05:02,907 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2023-02-15 20:05:02,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:02,908 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-02-15 20:05:02,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 20:05:02,908 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-02-15 20:05:02,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 20:05:02,908 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:02,908 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:02,923 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 20:05:03,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 20:05:03,125 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:03,125 INFO L85 PathProgramCache]: Analyzing trace with hash 466281565, now seen corresponding path program 7 times [2023-02-15 20:05:03,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:03,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482045433] [2023-02-15 20:05:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:03,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:03,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:03,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482045433] [2023-02-15 20:05:03,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482045433] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:03,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571909832] [2023-02-15 20:05:03,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:05:03,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:03,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:03,286 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 20:05:03,291 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 20:05:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:03,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 20:05:03,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:03,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:03,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571909832] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:03,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:03,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-02-15 20:05:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472590770] [2023-02-15 20:05:03,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:03,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 20:05:03,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:03,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 20:05:03,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2023-02-15 20:05:03,607 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:03,770 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2023-02-15 20:05:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 20:05:03,770 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 20:05:03,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:03,771 INFO L225 Difference]: With dead ends: 77 [2023-02-15 20:05:03,771 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 20:05:03,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=345, Invalid=1295, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 20:05:03,772 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:03,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 147 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 20:05:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2023-02-15 20:05:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-02-15 20:05:03,777 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2023-02-15 20:05:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:03,778 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-02-15 20:05:03,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-02-15 20:05:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 20:05:03,778 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:03,778 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:03,784 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 20:05:03,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:03,979 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:03,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:03,979 INFO L85 PathProgramCache]: Analyzing trace with hash 397088156, now seen corresponding path program 4 times [2023-02-15 20:05:03,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:03,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358833894] [2023-02-15 20:05:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:03,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:04,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:04,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358833894] [2023-02-15 20:05:04,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358833894] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:04,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938427284] [2023-02-15 20:05:04,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:05:04,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:04,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:04,105 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 20:05:04,172 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 20:05:04,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:05:04,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:04,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 20:05:04,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:04,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:04,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938427284] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:04,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:04,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2023-02-15 20:05:04,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39491387] [2023-02-15 20:05:04,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:04,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 20:05:04,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:04,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 20:05:04,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2023-02-15 20:05:04,451 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:04,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:04,643 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2023-02-15 20:05:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 20:05:04,643 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 20:05:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:04,644 INFO L225 Difference]: With dead ends: 98 [2023-02-15 20:05:04,644 INFO L226 Difference]: Without dead ends: 79 [2023-02-15 20:05:04,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 20:05:04,646 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:04,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 104 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:05:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-15 20:05:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 37. [2023-02-15 20:05:04,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-02-15 20:05:04,655 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2023-02-15 20:05:04,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:04,655 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-02-15 20:05:04,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-02-15 20:05:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 20:05:04,656 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:04,656 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:04,661 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 20:05:04,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 20:05:04,861 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:04,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1267711875, now seen corresponding path program 5 times [2023-02-15 20:05:04,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:04,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688021719] [2023-02-15 20:05:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:04,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:04,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:04,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688021719] [2023-02-15 20:05:04,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688021719] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:04,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614359785] [2023-02-15 20:05:04,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:05:04,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:04,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:04,976 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 20:05:04,978 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 20:05:05,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 20:05:05,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:05,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 20:05:05,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:05,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:05,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614359785] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:05,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:05,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2023-02-15 20:05:05,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523564820] [2023-02-15 20:05:05,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:05,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 20:05:05,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:05,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 20:05:05,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2023-02-15 20:05:05,266 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:05,490 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2023-02-15 20:05:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 20:05:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 20:05:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:05,491 INFO L225 Difference]: With dead ends: 118 [2023-02-15 20:05:05,491 INFO L226 Difference]: Without dead ends: 99 [2023-02-15 20:05:05,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 20:05:05,492 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:05,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 171 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:05,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-15 20:05:05,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 37. [2023-02-15 20:05:05,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-02-15 20:05:05,501 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2023-02-15 20:05:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:05,501 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-02-15 20:05:05,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-02-15 20:05:05,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 20:05:05,502 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:05,503 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:05,509 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 20:05:05,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 20:05:05,707 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash 618247548, now seen corresponding path program 6 times [2023-02-15 20:05:05,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:05,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881280543] [2023-02-15 20:05:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:05,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:05,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:05,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881280543] [2023-02-15 20:05:05,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881280543] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:05,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290144553] [2023-02-15 20:05:05,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:05:05,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:05,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:05,812 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 20:05:05,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 20:05:05,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 20:05:05,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:05,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 20:05:05,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:05,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:06,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290144553] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:06,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:06,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2023-02-15 20:05:06,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199079895] [2023-02-15 20:05:06,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:06,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 20:05:06,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:06,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 20:05:06,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2023-02-15 20:05:06,003 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:06,159 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2023-02-15 20:05:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 20:05:06,159 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 20:05:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:06,160 INFO L225 Difference]: With dead ends: 137 [2023-02-15 20:05:06,160 INFO L226 Difference]: Without dead ends: 118 [2023-02-15 20:05:06,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 20:05:06,161 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 153 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:06,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 133 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:05:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-15 20:05:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 37. [2023-02-15 20:05:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-02-15 20:05:06,166 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2023-02-15 20:05:06,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:06,167 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-02-15 20:05:06,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-02-15 20:05:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 20:05:06,167 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:06,167 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:06,183 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 20:05:06,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 20:05:06,368 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:06,368 INFO L85 PathProgramCache]: Analyzing trace with hash 956179613, now seen corresponding path program 4 times [2023-02-15 20:05:06,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:06,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264061057] [2023-02-15 20:05:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:06,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:06,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:06,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264061057] [2023-02-15 20:05:06,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264061057] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:06,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932884358] [2023-02-15 20:05:06,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:05:06,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:06,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:06,480 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 20:05:06,513 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 20:05:06,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:05:06,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 20:05:06,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:06,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:06,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932884358] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:06,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:06,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2023-02-15 20:05:06,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095825095] [2023-02-15 20:05:06,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:06,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 20:05:06,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 20:05:06,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-02-15 20:05:06,782 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:07,020 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2023-02-15 20:05:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 20:05:07,020 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 20:05:07,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:07,021 INFO L225 Difference]: With dead ends: 158 [2023-02-15 20:05:07,021 INFO L226 Difference]: Without dead ends: 139 [2023-02-15 20:05:07,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 20:05:07,023 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 135 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:07,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 150 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-15 20:05:07,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 39. [2023-02-15 20:05:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-02-15 20:05:07,030 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2023-02-15 20:05:07,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:07,030 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-02-15 20:05:07,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-02-15 20:05:07,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 20:05:07,031 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:07,031 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:07,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-15 20:05:07,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:07,236 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:07,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:07,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1056697641, now seen corresponding path program 8 times [2023-02-15 20:05:07,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:07,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860328811] [2023-02-15 20:05:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:07,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:07,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:07,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860328811] [2023-02-15 20:05:07,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860328811] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:07,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791502179] [2023-02-15 20:05:07,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:05:07,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:07,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:07,317 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 20:05:07,343 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 20:05:07,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:05:07,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:07,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 20:05:07,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:07,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:07,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791502179] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:07,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:07,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2023-02-15 20:05:07,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903676909] [2023-02-15 20:05:07,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:07,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 20:05:07,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 20:05:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-02-15 20:05:07,432 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 20:05:07,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:07,503 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2023-02-15 20:05:07,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 20:05:07,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2023-02-15 20:05:07,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:07,504 INFO L225 Difference]: With dead ends: 50 [2023-02-15 20:05:07,504 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 20:05:07,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:05:07,505 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:07,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 80 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:05:07,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 20:05:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2023-02-15 20:05:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-02-15 20:05:07,522 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 28 [2023-02-15 20:05:07,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:07,522 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-02-15 20:05:07,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 20:05:07,522 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-02-15 20:05:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 20:05:07,522 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:07,522 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:07,529 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 20:05:07,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:07,723 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:07,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2035699769, now seen corresponding path program 9 times [2023-02-15 20:05:07,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:07,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18857160] [2023-02-15 20:05:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:07,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:07,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:07,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18857160] [2023-02-15 20:05:07,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18857160] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:07,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148047405] [2023-02-15 20:05:07,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:05:07,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:07,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:07,852 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 20:05:07,885 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 20:05:07,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 20:05:07,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:07,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 20:05:07,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:08,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:08,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148047405] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:08,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:08,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-15 20:05:08,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307678442] [2023-02-15 20:05:08,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:08,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 20:05:08,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:08,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 20:05:08,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 20:05:08,251 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:08,449 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2023-02-15 20:05:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 20:05:08,449 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-15 20:05:08,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:08,449 INFO L225 Difference]: With dead ends: 90 [2023-02-15 20:05:08,449 INFO L226 Difference]: Without dead ends: 68 [2023-02-15 20:05:08,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=442, Invalid=1720, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 20:05:08,450 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:08,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 157 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:08,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-15 20:05:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2023-02-15 20:05:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-02-15 20:05:08,463 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2023-02-15 20:05:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:08,463 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-02-15 20:05:08,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-02-15 20:05:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 20:05:08,464 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:08,464 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:08,471 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 20:05:08,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-15 20:05:08,669 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:08,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:08,670 INFO L85 PathProgramCache]: Analyzing trace with hash 992856568, now seen corresponding path program 7 times [2023-02-15 20:05:08,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:08,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508208963] [2023-02-15 20:05:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:08,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:08,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:08,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508208963] [2023-02-15 20:05:08,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508208963] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:08,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105799731] [2023-02-15 20:05:08,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:05:08,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:08,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:08,802 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 20:05:08,803 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 20:05:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:08,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 20:05:08,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:09,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:09,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105799731] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:09,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:09,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2023-02-15 20:05:09,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597655314] [2023-02-15 20:05:09,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:09,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 20:05:09,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 20:05:09,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2023-02-15 20:05:09,220 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:09,488 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2023-02-15 20:05:09,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 20:05:09,488 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-15 20:05:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:09,488 INFO L225 Difference]: With dead ends: 115 [2023-02-15 20:05:09,489 INFO L226 Difference]: Without dead ends: 93 [2023-02-15 20:05:09,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=490, Invalid=2060, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 20:05:09,490 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:09,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 225 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:09,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-15 20:05:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 43. [2023-02-15 20:05:09,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-02-15 20:05:09,502 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2023-02-15 20:05:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:09,502 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-02-15 20:05:09,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-02-15 20:05:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 20:05:09,503 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:09,503 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:09,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:09,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-15 20:05:09,707 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:09,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1236311129, now seen corresponding path program 8 times [2023-02-15 20:05:09,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:09,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129846818] [2023-02-15 20:05:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:09,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:09,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:09,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129846818] [2023-02-15 20:05:09,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129846818] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:09,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548157068] [2023-02-15 20:05:09,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:05:09,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:09,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:09,842 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 20:05:09,844 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 20:05:09,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:05:09,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:09,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 20:05:09,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:10,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:10,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548157068] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:10,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:10,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2023-02-15 20:05:10,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410920774] [2023-02-15 20:05:10,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:10,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 20:05:10,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 20:05:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2023-02-15 20:05:10,232 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:10,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:10,496 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2023-02-15 20:05:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 20:05:10,497 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-15 20:05:10,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:10,498 INFO L225 Difference]: With dead ends: 139 [2023-02-15 20:05:10,498 INFO L226 Difference]: Without dead ends: 117 [2023-02-15 20:05:10,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=520, Invalid=2236, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 20:05:10,502 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 124 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:10,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 173 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-15 20:05:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 43. [2023-02-15 20:05:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-02-15 20:05:10,519 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2023-02-15 20:05:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:10,520 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-02-15 20:05:10,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-02-15 20:05:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 20:05:10,520 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:10,520 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:10,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:10,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:10,725 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:10,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash -834045480, now seen corresponding path program 9 times [2023-02-15 20:05:10,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:10,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980872433] [2023-02-15 20:05:10,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:10,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:10,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:10,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980872433] [2023-02-15 20:05:10,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980872433] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:10,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208758688] [2023-02-15 20:05:10,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:05:10,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:10,855 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 20:05:10,890 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 20:05:10,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 20:05:10,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:10,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 20:05:10,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:11,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:11,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208758688] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:11,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:11,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2023-02-15 20:05:11,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230667449] [2023-02-15 20:05:11,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:11,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 20:05:11,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:11,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 20:05:11,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2023-02-15 20:05:11,201 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:11,499 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2023-02-15 20:05:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 20:05:11,499 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-15 20:05:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:11,499 INFO L225 Difference]: With dead ends: 162 [2023-02-15 20:05:11,499 INFO L226 Difference]: Without dead ends: 140 [2023-02-15 20:05:11,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=519, Invalid=2237, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 20:05:11,501 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 140 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:11,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 171 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:11,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-15 20:05:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 43. [2023-02-15 20:05:11,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-02-15 20:05:11,510 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2023-02-15 20:05:11,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:11,510 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-02-15 20:05:11,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:11,511 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-02-15 20:05:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 20:05:11,511 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:11,511 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:11,518 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 20:05:11,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:11,716 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:11,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:11,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1315926137, now seen corresponding path program 10 times [2023-02-15 20:05:11,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:11,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829797628] [2023-02-15 20:05:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:11,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:11,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:11,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829797628] [2023-02-15 20:05:11,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829797628] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:11,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583505330] [2023-02-15 20:05:11,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:05:11,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:11,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:11,865 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 20:05:11,945 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 20:05:11,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:05:11,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:11,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 20:05:11,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:12,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:12,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583505330] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:12,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:12,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2023-02-15 20:05:12,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152326918] [2023-02-15 20:05:12,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:12,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 20:05:12,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:12,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 20:05:12,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2023-02-15 20:05:12,263 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:12,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:12,520 INFO L93 Difference]: Finished difference Result 184 states and 197 transitions. [2023-02-15 20:05:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 20:05:12,525 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-15 20:05:12,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:12,526 INFO L225 Difference]: With dead ends: 184 [2023-02-15 20:05:12,526 INFO L226 Difference]: Without dead ends: 162 [2023-02-15 20:05:12,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=487, Invalid=2063, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 20:05:12,527 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 150 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:12,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 165 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-15 20:05:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 43. [2023-02-15 20:05:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-02-15 20:05:12,538 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2023-02-15 20:05:12,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:12,538 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-02-15 20:05:12,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-02-15 20:05:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 20:05:12,539 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:12,539 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:12,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:12,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-15 20:05:12,746 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:12,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:12,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1246732728, now seen corresponding path program 5 times [2023-02-15 20:05:12,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:12,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624983679] [2023-02-15 20:05:12,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:12,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:12,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:12,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624983679] [2023-02-15 20:05:12,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624983679] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:12,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395598560] [2023-02-15 20:05:12,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:05:12,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:12,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:12,891 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 20:05:12,892 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 20:05:12,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 20:05:12,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 20:05:12,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:13,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:13,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395598560] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:13,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:13,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2023-02-15 20:05:13,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450409881] [2023-02-15 20:05:13,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:13,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 20:05:13,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:13,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 20:05:13,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2023-02-15 20:05:13,215 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:13,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:13,480 INFO L93 Difference]: Finished difference Result 208 states and 223 transitions. [2023-02-15 20:05:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 20:05:13,480 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-15 20:05:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:13,481 INFO L225 Difference]: With dead ends: 208 [2023-02-15 20:05:13,481 INFO L226 Difference]: Without dead ends: 186 [2023-02-15 20:05:13,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 20:05:13,482 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 229 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:13,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 129 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:13,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-02-15 20:05:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 45. [2023-02-15 20:05:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-02-15 20:05:13,493 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 31 [2023-02-15 20:05:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:13,494 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-02-15 20:05:13,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-02-15 20:05:13,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 20:05:13,494 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:13,494 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:13,499 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 20:05:13,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-15 20:05:13,699 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:13,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1761587635, now seen corresponding path program 10 times [2023-02-15 20:05:13,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:13,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611422344] [2023-02-15 20:05:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:13,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:13,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:13,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611422344] [2023-02-15 20:05:13,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611422344] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:13,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493934145] [2023-02-15 20:05:13,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:05:13,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:13,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:13,801 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 20:05:13,845 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 20:05:13,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:05:13,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:13,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:05:13,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:13,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:13,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493934145] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:13,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:13,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2023-02-15 20:05:13,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331841480] [2023-02-15 20:05:13,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:13,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 20:05:13,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:13,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 20:05:13,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:05:13,997 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 20:05:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:14,105 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2023-02-15 20:05:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 20:05:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 32 [2023-02-15 20:05:14,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:14,106 INFO L225 Difference]: With dead ends: 56 [2023-02-15 20:05:14,106 INFO L226 Difference]: Without dead ends: 54 [2023-02-15 20:05:14,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2023-02-15 20:05:14,107 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:14,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 100 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:05:14,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-15 20:05:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-02-15 20:05:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-02-15 20:05:14,119 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 32 [2023-02-15 20:05:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:14,120 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-02-15 20:05:14,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 20:05:14,120 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-02-15 20:05:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 20:05:14,120 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:14,120 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:14,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:14,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-15 20:05:14,325 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:14,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:14,325 INFO L85 PathProgramCache]: Analyzing trace with hash -743312419, now seen corresponding path program 11 times [2023-02-15 20:05:14,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:14,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671616038] [2023-02-15 20:05:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:14,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:14,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:14,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671616038] [2023-02-15 20:05:14,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671616038] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:14,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619216297] [2023-02-15 20:05:14,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:05:14,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:14,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:14,497 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 20:05:14,499 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 20:05:14,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-15 20:05:14,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:14,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:05:14,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:14,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:14,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619216297] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:14,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:14,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2023-02-15 20:05:14,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501194637] [2023-02-15 20:05:14,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:14,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 20:05:14,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:14,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 20:05:14,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 20:05:14,960 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:15,146 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2023-02-15 20:05:15,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 20:05:15,146 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 20:05:15,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:15,147 INFO L225 Difference]: With dead ends: 103 [2023-02-15 20:05:15,147 INFO L226 Difference]: Without dead ends: 78 [2023-02-15 20:05:15,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=551, Invalid=2205, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 20:05:15,149 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:15,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 142 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:05:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-15 20:05:15,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2023-02-15 20:05:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-15 20:05:15,166 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2023-02-15 20:05:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:15,167 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-15 20:05:15,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:15,167 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-15 20:05:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 20:05:15,176 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:15,176 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:15,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:15,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-15 20:05:15,381 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2052557284, now seen corresponding path program 11 times [2023-02-15 20:05:15,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:15,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540271180] [2023-02-15 20:05:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:15,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:15,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:15,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540271180] [2023-02-15 20:05:15,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540271180] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:15,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508198584] [2023-02-15 20:05:15,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:05:15,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:15,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:15,542 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 20:05:15,557 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 20:05:15,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-15 20:05:15,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:15,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:05:15,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:15,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:15,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508198584] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:15,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:15,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2023-02-15 20:05:15,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508346849] [2023-02-15 20:05:15,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:15,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 20:05:15,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:15,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 20:05:15,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 20:05:15,956 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:16,204 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2023-02-15 20:05:16,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 20:05:16,205 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 20:05:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:16,205 INFO L225 Difference]: With dead ends: 132 [2023-02-15 20:05:16,205 INFO L226 Difference]: Without dead ends: 107 [2023-02-15 20:05:16,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=622, Invalid=2684, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 20:05:16,207 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 103 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:16,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 182 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-15 20:05:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 49. [2023-02-15 20:05:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-15 20:05:16,221 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2023-02-15 20:05:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:16,221 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-15 20:05:16,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-15 20:05:16,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 20:05:16,221 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:16,222 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:16,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:16,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-15 20:05:16,426 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:16,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:16,427 INFO L85 PathProgramCache]: Analyzing trace with hash 399060989, now seen corresponding path program 12 times [2023-02-15 20:05:16,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:16,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938436711] [2023-02-15 20:05:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:16,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:16,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:16,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938436711] [2023-02-15 20:05:16,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938436711] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:16,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523645518] [2023-02-15 20:05:16,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:05:16,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:16,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:16,599 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 20:05:16,601 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 20:05:16,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 20:05:16,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:16,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:05:16,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:16,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:17,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523645518] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:17,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:17,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2023-02-15 20:05:17,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771944181] [2023-02-15 20:05:17,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:17,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 20:05:17,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:17,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 20:05:17,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 20:05:17,006 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:17,347 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2023-02-15 20:05:17,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 20:05:17,347 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 20:05:17,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:17,348 INFO L225 Difference]: With dead ends: 160 [2023-02-15 20:05:17,348 INFO L226 Difference]: Without dead ends: 135 [2023-02-15 20:05:17,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=675, Invalid=2985, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 20:05:17,349 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:17,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 167 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-15 20:05:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 49. [2023-02-15 20:05:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-15 20:05:17,365 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2023-02-15 20:05:17,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:17,365 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-15 20:05:17,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:17,365 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-15 20:05:17,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 20:05:17,366 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:17,366 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:17,372 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 20:05:17,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:17,570 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:17,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1045875204, now seen corresponding path program 13 times [2023-02-15 20:05:17,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:17,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264278297] [2023-02-15 20:05:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:17,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:17,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:17,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264278297] [2023-02-15 20:05:17,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264278297] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:17,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872260706] [2023-02-15 20:05:17,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:05:17,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:17,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:17,769 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 20:05:17,771 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 20:05:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:17,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:05:17,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:18,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:18,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872260706] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:18,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:18,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 34 [2023-02-15 20:05:18,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907116786] [2023-02-15 20:05:18,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:18,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 20:05:18,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:18,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 20:05:18,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 20:05:18,188 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:18,515 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2023-02-15 20:05:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-15 20:05:18,515 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 20:05:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:18,516 INFO L225 Difference]: With dead ends: 187 [2023-02-15 20:05:18,516 INFO L226 Difference]: Without dead ends: 162 [2023-02-15 20:05:18,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 15 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=693, Invalid=3089, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 20:05:18,517 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:18,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 207 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:18,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-15 20:05:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 49. [2023-02-15 20:05:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-15 20:05:18,533 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2023-02-15 20:05:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:18,534 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-15 20:05:18,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-15 20:05:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 20:05:18,534 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:18,534 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:18,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-02-15 20:05:18,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-02-15 20:05:18,737 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:18,738 INFO L85 PathProgramCache]: Analyzing trace with hash 985723933, now seen corresponding path program 14 times [2023-02-15 20:05:18,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:18,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161876024] [2023-02-15 20:05:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:18,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:18,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:18,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161876024] [2023-02-15 20:05:18,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161876024] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:18,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953047177] [2023-02-15 20:05:18,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:05:18,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:18,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:18,925 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 20:05:18,951 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 20:05:18,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:05:18,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:18,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:05:18,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:19,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:19,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953047177] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:19,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:19,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2023-02-15 20:05:19,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860093781] [2023-02-15 20:05:19,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:19,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 20:05:19,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:19,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 20:05:19,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 20:05:19,288 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:19,635 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2023-02-15 20:05:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 20:05:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 20:05:19,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:19,636 INFO L225 Difference]: With dead ends: 213 [2023-02-15 20:05:19,636 INFO L226 Difference]: Without dead ends: 188 [2023-02-15 20:05:19,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=673, Invalid=2987, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 20:05:19,639 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 183 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:19,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 163 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-02-15 20:05:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 49. [2023-02-15 20:05:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:19,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-15 20:05:19,657 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2023-02-15 20:05:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:19,657 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-15 20:05:19,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-15 20:05:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 20:05:19,657 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:19,657 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:19,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:19,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:19,862 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash -57119268, now seen corresponding path program 15 times [2023-02-15 20:05:19,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:19,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181588725] [2023-02-15 20:05:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:19,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:20,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:20,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181588725] [2023-02-15 20:05:20,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181588725] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:20,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384155499] [2023-02-15 20:05:20,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:05:20,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:20,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:20,006 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:20,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-15 20:05:20,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-15 20:05:20,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:20,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:05:20,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:20,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:20,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384155499] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:20,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:20,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 32 [2023-02-15 20:05:20,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060548736] [2023-02-15 20:05:20,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:20,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 20:05:20,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 20:05:20,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2023-02-15 20:05:20,448 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:20,918 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2023-02-15 20:05:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-15 20:05:20,919 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 20:05:20,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:20,919 INFO L225 Difference]: With dead ends: 238 [2023-02-15 20:05:20,919 INFO L226 Difference]: Without dead ends: 213 [2023-02-15 20:05:20,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 15 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=618, Invalid=2688, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 20:05:20,920 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 175 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:20,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 184 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:20,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-02-15 20:05:20,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 49. [2023-02-15 20:05:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:20,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-15 20:05:20,938 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2023-02-15 20:05:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:20,938 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-15 20:05:20,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-15 20:05:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 20:05:20,939 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:20,939 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:20,943 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 20:05:21,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:21,143 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:21,143 INFO L85 PathProgramCache]: Analyzing trace with hash 186335293, now seen corresponding path program 6 times [2023-02-15 20:05:21,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:21,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330681463] [2023-02-15 20:05:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:21,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:21,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:21,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330681463] [2023-02-15 20:05:21,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330681463] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:21,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063329121] [2023-02-15 20:05:21,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:05:21,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:21,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:21,319 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 20:05:21,321 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 20:05:21,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 20:05:21,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:21,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:05:21,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:21,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:21,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063329121] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:21,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:21,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2023-02-15 20:05:21,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883131866] [2023-02-15 20:05:21,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:21,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 20:05:21,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:21,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 20:05:21,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2023-02-15 20:05:21,692 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:22,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:22,072 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2023-02-15 20:05:22,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 20:05:22,073 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 20:05:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:22,073 INFO L225 Difference]: With dead ends: 265 [2023-02-15 20:05:22,073 INFO L226 Difference]: Without dead ends: 240 [2023-02-15 20:05:22,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 43 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 20:05:22,074 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 208 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:22,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 184 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-02-15 20:05:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 51. [2023-02-15 20:05:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2023-02-15 20:05:22,098 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 35 [2023-02-15 20:05:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:22,098 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2023-02-15 20:05:22,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2023-02-15 20:05:22,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 20:05:22,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:22,098 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:22,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:22,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-02-15 20:05:22,302 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:22,302 INFO L85 PathProgramCache]: Analyzing trace with hash 611977303, now seen corresponding path program 12 times [2023-02-15 20:05:22,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:22,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002739532] [2023-02-15 20:05:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:22,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:22,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:22,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002739532] [2023-02-15 20:05:22,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002739532] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:22,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670387454] [2023-02-15 20:05:22,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:05:22,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:22,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:22,403 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 20:05:22,441 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 20:05:22,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 20:05:22,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:22,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 20:05:22,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:22,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:22,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670387454] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:22,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:22,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2023-02-15 20:05:22,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374417344] [2023-02-15 20:05:22,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:22,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 20:05:22,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:22,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 20:05:22,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:05:22,589 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 20:05:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:22,724 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2023-02-15 20:05:22,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 20:05:22,724 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 36 [2023-02-15 20:05:22,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:22,724 INFO L225 Difference]: With dead ends: 62 [2023-02-15 20:05:22,724 INFO L226 Difference]: Without dead ends: 60 [2023-02-15 20:05:22,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 14 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:05:22,726 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:22,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 123 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-15 20:05:22,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2023-02-15 20:05:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2023-02-15 20:05:22,745 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 36 [2023-02-15 20:05:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:22,746 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2023-02-15 20:05:22,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 20:05:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2023-02-15 20:05:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:05:22,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:22,746 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:22,751 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 20:05:22,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-15 20:05:22,950 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:22,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:22,951 INFO L85 PathProgramCache]: Analyzing trace with hash -715494727, now seen corresponding path program 13 times [2023-02-15 20:05:22,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:22,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257461838] [2023-02-15 20:05:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:22,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:23,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:23,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257461838] [2023-02-15 20:05:23,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257461838] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:23,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829740869] [2023-02-15 20:05:23,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:05:23,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:23,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:23,119 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 20:05:23,121 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 20:05:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:23,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 20:05:23,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:23,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:23,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829740869] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:23,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:23,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2023-02-15 20:05:23,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722641489] [2023-02-15 20:05:23,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:23,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 20:05:23,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:23,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 20:05:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 20:05:23,590 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:23,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:23,869 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2023-02-15 20:05:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 20:05:23,870 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-15 20:05:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:23,870 INFO L225 Difference]: With dead ends: 116 [2023-02-15 20:05:23,870 INFO L226 Difference]: Without dead ends: 88 [2023-02-15 20:05:23,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=672, Invalid=2750, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 20:05:23,871 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:23,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 177 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-15 20:05:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2023-02-15 20:05:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-15 20:05:23,898 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-15 20:05:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:23,898 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-15 20:05:23,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-15 20:05:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:05:23,899 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:23,899 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:23,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-02-15 20:05:24,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-15 20:05:24,103 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash -944261768, now seen corresponding path program 16 times [2023-02-15 20:05:24,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:24,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170784071] [2023-02-15 20:05:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:24,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:24,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:24,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170784071] [2023-02-15 20:05:24,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170784071] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:24,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899142606] [2023-02-15 20:05:24,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:05:24,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:24,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:24,239 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:24,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-15 20:05:24,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:05:24,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:24,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 20:05:24,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:24,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:24,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899142606] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:24,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:24,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2023-02-15 20:05:24,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266364329] [2023-02-15 20:05:24,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:24,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 20:05:24,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 20:05:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 20:05:24,734 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:25,086 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2023-02-15 20:05:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 20:05:25,086 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-15 20:05:25,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:25,087 INFO L225 Difference]: With dead ends: 149 [2023-02-15 20:05:25,087 INFO L226 Difference]: Without dead ends: 121 [2023-02-15 20:05:25,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=770, Invalid=3390, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 20:05:25,088 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:25,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 179 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:25,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-15 20:05:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 55. [2023-02-15 20:05:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-15 20:05:25,117 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-15 20:05:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:25,117 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-15 20:05:25,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-15 20:05:25,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:05:25,118 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:25,118 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:25,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:25,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:25,323 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:25,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2060020007, now seen corresponding path program 17 times [2023-02-15 20:05:25,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:25,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921470268] [2023-02-15 20:05:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:25,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:25,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:25,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921470268] [2023-02-15 20:05:25,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921470268] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:25,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263835761] [2023-02-15 20:05:25,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:05:25,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:25,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:25,521 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:25,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-15 20:05:25,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-15 20:05:25,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:25,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 20:05:25,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:25,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:26,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263835761] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:26,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:26,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 39 [2023-02-15 20:05:26,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197425073] [2023-02-15 20:05:26,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:26,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-15 20:05:26,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-15 20:05:26,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 20:05:26,002 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:26,438 INFO L93 Difference]: Finished difference Result 181 states and 194 transitions. [2023-02-15 20:05:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 20:05:26,439 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-15 20:05:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:26,439 INFO L225 Difference]: With dead ends: 181 [2023-02-15 20:05:26,439 INFO L226 Difference]: Without dead ends: 153 [2023-02-15 20:05:26,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 17 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=851, Invalid=3841, Unknown=0, NotChecked=0, Total=4692 [2023-02-15 20:05:26,440 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 96 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:26,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 275 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:26,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-15 20:05:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 55. [2023-02-15 20:05:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-15 20:05:26,480 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-15 20:05:26,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:26,481 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-15 20:05:26,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:26,481 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-15 20:05:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:05:26,481 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:26,481 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:26,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:26,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-15 20:05:26,686 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:26,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:26,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1818917544, now seen corresponding path program 18 times [2023-02-15 20:05:26,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:26,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040866268] [2023-02-15 20:05:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:26,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:26,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:26,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040866268] [2023-02-15 20:05:26,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040866268] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:26,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518155520] [2023-02-15 20:05:26,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:05:26,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:26,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:26,844 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:26,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-15 20:05:26,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-02-15 20:05:26,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:26,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 20:05:26,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:27,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:27,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518155520] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:27,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:27,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 38 [2023-02-15 20:05:27,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138542418] [2023-02-15 20:05:27,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:27,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 20:05:27,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:27,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 20:05:27,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 20:05:27,215 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:27,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:27,668 INFO L93 Difference]: Finished difference Result 212 states and 226 transitions. [2023-02-15 20:05:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 20:05:27,668 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-15 20:05:27,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:27,669 INFO L225 Difference]: With dead ends: 212 [2023-02-15 20:05:27,669 INFO L226 Difference]: Without dead ends: 184 [2023-02-15 20:05:27,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 17 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=894, Invalid=4076, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 20:05:27,670 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:27,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 195 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-02-15 20:05:27,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 55. [2023-02-15 20:05:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-15 20:05:27,696 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-15 20:05:27,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:27,696 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-15 20:05:27,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-15 20:05:27,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:05:27,697 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:27,697 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:27,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:27,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-15 20:05:27,901 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:27,902 INFO L85 PathProgramCache]: Analyzing trace with hash 544164601, now seen corresponding path program 19 times [2023-02-15 20:05:27,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:27,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509816233] [2023-02-15 20:05:27,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:27,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:28,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:28,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509816233] [2023-02-15 20:05:28,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509816233] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:28,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306816333] [2023-02-15 20:05:28,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:05:28,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:28,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:28,071 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:28,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-15 20:05:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:28,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 20:05:28,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:28,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:28,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306816333] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:28,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:28,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2023-02-15 20:05:28,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978433698] [2023-02-15 20:05:28,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:28,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 20:05:28,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:28,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 20:05:28,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 20:05:28,528 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:28,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:28,946 INFO L93 Difference]: Finished difference Result 242 states and 257 transitions. [2023-02-15 20:05:28,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 20:05:28,946 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-15 20:05:28,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:28,947 INFO L225 Difference]: With dead ends: 242 [2023-02-15 20:05:28,947 INFO L226 Difference]: Without dead ends: 214 [2023-02-15 20:05:28,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 17 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=893, Invalid=4077, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 20:05:28,948 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 192 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:28,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 184 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:28,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-02-15 20:05:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 55. [2023-02-15 20:05:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-15 20:05:28,975 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-15 20:05:28,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:28,975 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-15 20:05:28,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:28,975 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-15 20:05:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:05:28,976 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:28,976 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:28,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-02-15 20:05:29,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-15 20:05:29,181 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash -765080264, now seen corresponding path program 20 times [2023-02-15 20:05:29,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:29,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086370588] [2023-02-15 20:05:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:29,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:29,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:29,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086370588] [2023-02-15 20:05:29,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086370588] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:29,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559485058] [2023-02-15 20:05:29,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:05:29,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:29,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:29,344 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:29,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-15 20:05:29,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:05:29,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:29,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 20:05:29,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:29,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:29,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559485058] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:29,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:29,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 36 [2023-02-15 20:05:29,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971480507] [2023-02-15 20:05:29,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:29,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 20:05:29,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:29,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 20:05:29,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 20:05:29,841 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:30,371 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2023-02-15 20:05:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 20:05:30,371 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-15 20:05:30,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:30,372 INFO L225 Difference]: With dead ends: 271 [2023-02-15 20:05:30,372 INFO L226 Difference]: Without dead ends: 243 [2023-02-15 20:05:30,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 46 SyntacticMatches, 17 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=848, Invalid=3844, Unknown=0, NotChecked=0, Total=4692 [2023-02-15 20:05:30,373 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 184 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:30,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 237 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-02-15 20:05:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 55. [2023-02-15 20:05:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-15 20:05:30,400 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-15 20:05:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:30,400 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-15 20:05:30,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-15 20:05:30,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:05:30,401 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:30,401 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:30,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-02-15 20:05:30,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-02-15 20:05:30,605 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:30,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:30,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1686538009, now seen corresponding path program 21 times [2023-02-15 20:05:30,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:30,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34102607] [2023-02-15 20:05:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:30,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:30,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:30,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34102607] [2023-02-15 20:05:30,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34102607] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:30,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968242898] [2023-02-15 20:05:30,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:05:30,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:30,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:30,783 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:30,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-15 20:05:30,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-15 20:05:30,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:30,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 20:05:30,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:31,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:31,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968242898] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:31,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:31,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2023-02-15 20:05:31,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599695093] [2023-02-15 20:05:31,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:31,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 20:05:31,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:31,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 20:05:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 20:05:31,232 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:31,748 INFO L93 Difference]: Finished difference Result 299 states and 316 transitions. [2023-02-15 20:05:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 20:05:31,748 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-15 20:05:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:31,749 INFO L225 Difference]: With dead ends: 299 [2023-02-15 20:05:31,749 INFO L226 Difference]: Without dead ends: 271 [2023-02-15 20:05:31,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 20:05:31,750 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 228 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:31,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 219 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-02-15 20:05:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 55. [2023-02-15 20:05:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-02-15 20:05:31,779 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2023-02-15 20:05:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:31,779 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-02-15 20:05:31,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-02-15 20:05:31,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:05:31,780 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:31,780 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:31,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:31,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:31,984 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:31,985 INFO L85 PathProgramCache]: Analyzing trace with hash 241601816, now seen corresponding path program 7 times [2023-02-15 20:05:31,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:31,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772553518] [2023-02-15 20:05:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:31,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:32,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:32,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772553518] [2023-02-15 20:05:32,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772553518] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:32,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699772856] [2023-02-15 20:05:32,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:05:32,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:32,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:32,151 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:32,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-15 20:05:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:32,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 20:05:32,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:32,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:32,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699772856] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:32,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:32,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2023-02-15 20:05:32,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003754071] [2023-02-15 20:05:32,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:32,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 20:05:32,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:32,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 20:05:32,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 20:05:32,580 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:32,983 INFO L93 Difference]: Finished difference Result 329 states and 348 transitions. [2023-02-15 20:05:32,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 20:05:32,983 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-15 20:05:32,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:32,984 INFO L225 Difference]: With dead ends: 329 [2023-02-15 20:05:32,984 INFO L226 Difference]: Without dead ends: 301 [2023-02-15 20:05:32,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 48 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 20:05:32,985 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 305 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:32,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 148 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:05:32,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-02-15 20:05:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 57. [2023-02-15 20:05:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2023-02-15 20:05:33,016 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 39 [2023-02-15 20:05:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:33,016 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2023-02-15 20:05:33,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2023-02-15 20:05:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 20:05:33,016 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:33,016 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:33,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-02-15 20:05:33,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:33,221 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1565543885, now seen corresponding path program 14 times [2023-02-15 20:05:33,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:33,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165868296] [2023-02-15 20:05:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:33,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:33,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:33,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165868296] [2023-02-15 20:05:33,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165868296] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:33,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093161645] [2023-02-15 20:05:33,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:05:33,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:33,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:33,347 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:33,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-15 20:05:33,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:05:33,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:33,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:05:33,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:33,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:33,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093161645] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:33,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:33,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2023-02-15 20:05:33,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931811414] [2023-02-15 20:05:33,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:33,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:05:33,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:33,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:05:33,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:05:33,542 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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 20:05:33,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:33,669 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2023-02-15 20:05:33,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 20:05:33,669 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-15 20:05:33,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:33,670 INFO L225 Difference]: With dead ends: 68 [2023-02-15 20:05:33,670 INFO L226 Difference]: Without dead ends: 66 [2023-02-15 20:05:33,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 16 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2023-02-15 20:05:33,671 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:33,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 149 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:05:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-15 20:05:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2023-02-15 20:05:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-02-15 20:05:33,702 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 40 [2023-02-15 20:05:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:33,703 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-02-15 20:05:33,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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 20:05:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-02-15 20:05:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:05:33,703 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:33,703 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:33,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-02-15 20:05:33,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-02-15 20:05:33,908 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:33,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:33,908 INFO L85 PathProgramCache]: Analyzing trace with hash -63167651, now seen corresponding path program 15 times [2023-02-15 20:05:33,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:33,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160383934] [2023-02-15 20:05:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:33,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:34,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:34,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160383934] [2023-02-15 20:05:34,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160383934] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:34,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886782729] [2023-02-15 20:05:34,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:05:34,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:34,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:34,159 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:34,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-15 20:05:34,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-15 20:05:34,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:34,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:05:34,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:34,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:34,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886782729] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:34,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:34,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2023-02-15 20:05:34,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490294998] [2023-02-15 20:05:34,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:34,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 20:05:34,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:34,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 20:05:34,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 20:05:34,653 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:34,933 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2023-02-15 20:05:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 20:05:34,934 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-15 20:05:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:34,934 INFO L225 Difference]: With dead ends: 129 [2023-02-15 20:05:34,934 INFO L226 Difference]: Without dead ends: 98 [2023-02-15 20:05:34,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=805, Invalid=3355, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 20:05:34,935 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:34,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 153 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-15 20:05:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2023-02-15 20:05:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-15 20:05:34,971 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-15 20:05:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:34,971 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-15 20:05:34,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:34,972 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-15 20:05:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:05:34,972 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:34,972 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:34,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:35,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-15 20:05:35,177 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:35,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:35,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1788348772, now seen corresponding path program 22 times [2023-02-15 20:05:35,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:35,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291567290] [2023-02-15 20:05:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:35,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:35,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:35,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291567290] [2023-02-15 20:05:35,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291567290] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:35,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214799810] [2023-02-15 20:05:35,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:05:35,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:35,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:35,378 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:35,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-15 20:05:35,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:05:35,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:35,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:05:35,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:35,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:35,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214799810] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:35,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:35,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2023-02-15 20:05:35,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566671192] [2023-02-15 20:05:35,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:35,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 20:05:35,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:35,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 20:05:35,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 20:05:35,969 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:36,437 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2023-02-15 20:05:36,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 20:05:36,438 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-15 20:05:36,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:36,438 INFO L225 Difference]: With dead ends: 166 [2023-02-15 20:05:36,438 INFO L226 Difference]: Without dead ends: 135 [2023-02-15 20:05:36,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 46 SyntacticMatches, 19 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2291 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=934, Invalid=4178, Unknown=0, NotChecked=0, Total=5112 [2023-02-15 20:05:36,439 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:36,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 178 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:36,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-15 20:05:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 61. [2023-02-15 20:05:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-15 20:05:36,477 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-15 20:05:36,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:36,477 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-15 20:05:36,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:36,477 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-15 20:05:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:05:36,478 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:36,478 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:36,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-02-15 20:05:36,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-15 20:05:36,682 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:36,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:36,682 INFO L85 PathProgramCache]: Analyzing trace with hash -874168451, now seen corresponding path program 23 times [2023-02-15 20:05:36,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:36,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987632995] [2023-02-15 20:05:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:36,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:36,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:36,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987632995] [2023-02-15 20:05:36,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987632995] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:36,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721300020] [2023-02-15 20:05:36,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:05:36,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:36,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:36,882 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:36,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-15 20:05:36,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-15 20:05:36,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:36,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:05:36,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:37,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:37,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721300020] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:37,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:37,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2023-02-15 20:05:37,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393547637] [2023-02-15 20:05:37,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:37,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 20:05:37,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:37,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 20:05:37,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1477, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 20:05:37,462 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:38,029 INFO L93 Difference]: Finished difference Result 202 states and 216 transitions. [2023-02-15 20:05:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 20:05:38,029 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-15 20:05:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:38,030 INFO L225 Difference]: With dead ends: 202 [2023-02-15 20:05:38,030 INFO L226 Difference]: Without dead ends: 171 [2023-02-15 20:05:38,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 19 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2502 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1048, Invalid=4804, Unknown=0, NotChecked=0, Total=5852 [2023-02-15 20:05:38,031 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 108 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:38,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 230 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:38,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-15 20:05:38,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 61. [2023-02-15 20:05:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-15 20:05:38,079 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-15 20:05:38,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:38,079 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-15 20:05:38,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:38,079 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-15 20:05:38,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:05:38,080 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:38,080 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:38,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-02-15 20:05:38,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:38,285 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:38,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1675962756, now seen corresponding path program 24 times [2023-02-15 20:05:38,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:38,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654023813] [2023-02-15 20:05:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:38,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:38,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:38,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654023813] [2023-02-15 20:05:38,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654023813] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:38,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628250356] [2023-02-15 20:05:38,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:05:38,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:38,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:38,525 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:38,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-15 20:05:38,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-02-15 20:05:38,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:38,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:05:38,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:38,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:39,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628250356] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:39,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:39,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 42 [2023-02-15 20:05:39,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140160934] [2023-02-15 20:05:39,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:39,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 20:05:39,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:39,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 20:05:39,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 20:05:39,037 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:39,635 INFO L93 Difference]: Finished difference Result 237 states and 252 transitions. [2023-02-15 20:05:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 20:05:39,635 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-15 20:05:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:39,636 INFO L225 Difference]: With dead ends: 237 [2023-02-15 20:05:39,636 INFO L226 Difference]: Without dead ends: 206 [2023-02-15 20:05:39,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 48 SyntacticMatches, 19 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1122, Invalid=5198, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 20:05:39,639 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:39,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 202 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-02-15 20:05:39,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 61. [2023-02-15 20:05:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-15 20:05:39,685 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-15 20:05:39,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:39,685 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-15 20:05:39,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-15 20:05:39,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:05:39,685 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:39,685 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:39,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-02-15 20:05:39,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-15 20:05:39,890 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:39,890 INFO L85 PathProgramCache]: Analyzing trace with hash -177806435, now seen corresponding path program 25 times [2023-02-15 20:05:39,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:39,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884660313] [2023-02-15 20:05:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:39,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:40,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:40,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884660313] [2023-02-15 20:05:40,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884660313] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:40,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704885430] [2023-02-15 20:05:40,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:05:40,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:40,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:40,083 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:40,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-15 20:05:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:05:40,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:40,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:40,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704885430] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:40,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:40,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2023-02-15 20:05:40,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856502816] [2023-02-15 20:05:40,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:40,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 20:05:40,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:40,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 20:05:40,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 20:05:40,631 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:41,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:41,222 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2023-02-15 20:05:41,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 20:05:41,222 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-15 20:05:41,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:41,222 INFO L225 Difference]: With dead ends: 271 [2023-02-15 20:05:41,222 INFO L226 Difference]: Without dead ends: 240 [2023-02-15 20:05:41,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 19 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1147, Invalid=5333, Unknown=0, NotChecked=0, Total=6480 [2023-02-15 20:05:41,223 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 201 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:41,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 195 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:41,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-02-15 20:05:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 61. [2023-02-15 20:05:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-15 20:05:41,268 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-15 20:05:41,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:41,268 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-15 20:05:41,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:41,268 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-15 20:05:41,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:05:41,269 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:41,269 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:41,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-02-15 20:05:41,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-15 20:05:41,473 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:41,473 INFO L85 PathProgramCache]: Analyzing trace with hash -406573476, now seen corresponding path program 26 times [2023-02-15 20:05:41,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:41,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581538336] [2023-02-15 20:05:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:41,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:41,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:41,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581538336] [2023-02-15 20:05:41,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581538336] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:41,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920384358] [2023-02-15 20:05:41,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:05:41,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:41,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:41,628 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:41,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-02-15 20:05:41,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:05:41,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:41,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:05:41,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:41,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:42,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920384358] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:42,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:42,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 40 [2023-02-15 20:05:42,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797039842] [2023-02-15 20:05:42,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:42,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 20:05:42,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:42,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 20:05:42,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 20:05:42,091 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:42,785 INFO L93 Difference]: Finished difference Result 304 states and 321 transitions. [2023-02-15 20:05:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-15 20:05:42,786 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-15 20:05:42,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:42,787 INFO L225 Difference]: With dead ends: 304 [2023-02-15 20:05:42,787 INFO L226 Difference]: Without dead ends: 273 [2023-02-15 20:05:42,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 50 SyntacticMatches, 19 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1120, Invalid=5200, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 20:05:42,787 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 263 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:42,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 227 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-02-15 20:05:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 61. [2023-02-15 20:05:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-15 20:05:42,834 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-15 20:05:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:42,835 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-15 20:05:42,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:42,835 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-15 20:05:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:05:42,835 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:42,835 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:42,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-02-15 20:05:43,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-15 20:05:43,040 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:43,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:43,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1522331715, now seen corresponding path program 27 times [2023-02-15 20:05:43,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:43,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593696330] [2023-02-15 20:05:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:43,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:43,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:43,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593696330] [2023-02-15 20:05:43,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593696330] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:43,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430526439] [2023-02-15 20:05:43,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:05:43,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:43,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:43,228 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:43,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-02-15 20:05:43,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-15 20:05:43,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:43,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:05:43,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:43,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:43,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430526439] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:43,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:43,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2023-02-15 20:05:43,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921690388] [2023-02-15 20:05:43,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:43,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-15 20:05:43,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:43,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-15 20:05:43,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 20:05:43,748 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:44,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:44,447 INFO L93 Difference]: Finished difference Result 336 states and 354 transitions. [2023-02-15 20:05:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 20:05:44,447 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-15 20:05:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:44,448 INFO L225 Difference]: With dead ends: 336 [2023-02-15 20:05:44,448 INFO L226 Difference]: Without dead ends: 305 [2023-02-15 20:05:44,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 51 SyntacticMatches, 19 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1044, Invalid=4808, Unknown=0, NotChecked=0, Total=5852 [2023-02-15 20:05:44,454 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 253 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:44,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 206 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-02-15 20:05:44,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 61. [2023-02-15 20:05:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-15 20:05:44,502 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-15 20:05:44,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:44,502 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-15 20:05:44,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-15 20:05:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:05:44,503 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:44,503 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:44,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-02-15 20:05:44,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-02-15 20:05:44,707 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:44,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:44,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1281229252, now seen corresponding path program 28 times [2023-02-15 20:05:44,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:44,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828823947] [2023-02-15 20:05:44,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:44,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:44,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:44,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828823947] [2023-02-15 20:05:44,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828823947] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:44,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067320992] [2023-02-15 20:05:44,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:05:44,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:44,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:44,858 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:44,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-02-15 20:05:44,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:05:44,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:44,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:05:44,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:45,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:45,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067320992] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:45,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:45,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2023-02-15 20:05:45,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243036129] [2023-02-15 20:05:45,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:45,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 20:05:45,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:45,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 20:05:45,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 20:05:45,185 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:45,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:45,782 INFO L93 Difference]: Finished difference Result 367 states and 386 transitions. [2023-02-15 20:05:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 20:05:45,783 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-15 20:05:45,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:45,784 INFO L225 Difference]: With dead ends: 367 [2023-02-15 20:05:45,784 INFO L226 Difference]: Without dead ends: 336 [2023-02-15 20:05:45,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 52 SyntacticMatches, 19 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=928, Invalid=4184, Unknown=0, NotChecked=0, Total=5112 [2023-02-15 20:05:45,791 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 229 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:45,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 254 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:45,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-02-15 20:05:45,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 61. [2023-02-15 20:05:45,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-02-15 20:05:45,841 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2023-02-15 20:05:45,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:45,841 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-02-15 20:05:45,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-02-15 20:05:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:05:45,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:45,842 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:45,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:46,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:46,046 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:46,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:46,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1081852893, now seen corresponding path program 8 times [2023-02-15 20:05:46,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:46,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237611333] [2023-02-15 20:05:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:46,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:46,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:46,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237611333] [2023-02-15 20:05:46,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237611333] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:46,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094954407] [2023-02-15 20:05:46,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:05:46,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:46,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:46,225 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:46,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-02-15 20:05:46,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:05:46,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:46,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:05:46,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:46,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:46,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094954407] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:46,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:46,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2023-02-15 20:05:46,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018520693] [2023-02-15 20:05:46,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:46,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 20:05:46,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 20:05:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 20:05:46,702 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:47,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:47,361 INFO L93 Difference]: Finished difference Result 400 states and 421 transitions. [2023-02-15 20:05:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 20:05:47,361 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-15 20:05:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:47,379 INFO L225 Difference]: With dead ends: 400 [2023-02-15 20:05:47,379 INFO L226 Difference]: Without dead ends: 369 [2023-02-15 20:05:47,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 53 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 20:05:47,380 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 311 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:47,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 180 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-02-15 20:05:47,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 63. [2023-02-15 20:05:47,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2023-02-15 20:05:47,438 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 43 [2023-02-15 20:05:47,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:47,438 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2023-02-15 20:05:47,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2023-02-15 20:05:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 20:05:47,439 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:47,439 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:47,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:47,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-02-15 20:05:47,643 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:47,644 INFO L85 PathProgramCache]: Analyzing trace with hash 105717207, now seen corresponding path program 16 times [2023-02-15 20:05:47,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:47,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510270547] [2023-02-15 20:05:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:47,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:47,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:47,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510270547] [2023-02-15 20:05:47,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510270547] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:47,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813536277] [2023-02-15 20:05:47,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:05:47,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:47,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:47,818 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:47,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-02-15 20:05:47,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:05:47,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:47,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:05:47,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:47,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:48,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813536277] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:48,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:48,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2023-02-15 20:05:48,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446203468] [2023-02-15 20:05:48,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:48,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 20:05:48,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 20:05:48,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-02-15 20:05:48,013 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:48,187 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2023-02-15 20:05:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 20:05:48,188 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-15 20:05:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:48,188 INFO L225 Difference]: With dead ends: 74 [2023-02-15 20:05:48,188 INFO L226 Difference]: Without dead ends: 72 [2023-02-15 20:05:48,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 18 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2023-02-15 20:05:48,189 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:48,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 154 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-15 20:05:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2023-02-15 20:05:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2023-02-15 20:05:48,239 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 44 [2023-02-15 20:05:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:48,239 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2023-02-15 20:05:48,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2023-02-15 20:05:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 20:05:48,240 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:48,240 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:48,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:48,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:48,444 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:48,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1215128889, now seen corresponding path program 17 times [2023-02-15 20:05:48,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:48,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671513182] [2023-02-15 20:05:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:48,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:48,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:48,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671513182] [2023-02-15 20:05:48,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671513182] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:48,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661932296] [2023-02-15 20:05:48,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:05:48,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:48,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:48,684 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:48,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-02-15 20:05:48,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-15 20:05:48,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:48,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:05:48,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:49,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:49,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661932296] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:49,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:49,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-02-15 20:05:49,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429678776] [2023-02-15 20:05:49,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:49,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 20:05:49,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:49,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 20:05:49,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 20:05:49,378 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:49,789 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2023-02-15 20:05:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 20:05:49,789 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-15 20:05:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:49,790 INFO L225 Difference]: With dead ends: 142 [2023-02-15 20:05:49,790 INFO L226 Difference]: Without dead ends: 108 [2023-02-15 20:05:49,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 49 SyntacticMatches, 21 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=950, Invalid=4020, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 20:05:49,790 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 75 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:49,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 165 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-15 20:05:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2023-02-15 20:05:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-15 20:05:49,846 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-15 20:05:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:49,847 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-15 20:05:49,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-15 20:05:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 20:05:49,847 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:49,847 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:49,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:50,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:50,052 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:50,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:50,052 INFO L85 PathProgramCache]: Analyzing trace with hash -185630472, now seen corresponding path program 29 times [2023-02-15 20:05:50,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:50,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245466736] [2023-02-15 20:05:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:50,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:50,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:50,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245466736] [2023-02-15 20:05:50,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245466736] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:50,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683240688] [2023-02-15 20:05:50,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:05:50,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:50,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:50,259 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:50,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-02-15 20:05:50,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-15 20:05:50,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:50,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:05:50,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:50,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:50,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683240688] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:50,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:50,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2023-02-15 20:05:50,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267266269] [2023-02-15 20:05:50,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:50,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 20:05:50,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:50,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 20:05:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 20:05:50,691 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:51,144 INFO L93 Difference]: Finished difference Result 183 states and 197 transitions. [2023-02-15 20:05:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 20:05:51,144 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-15 20:05:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:51,145 INFO L225 Difference]: With dead ends: 183 [2023-02-15 20:05:51,145 INFO L226 Difference]: Without dead ends: 149 [2023-02-15 20:05:51,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 50 SyntacticMatches, 21 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2813 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1114, Invalid=5048, Unknown=0, NotChecked=0, Total=6162 [2023-02-15 20:05:51,146 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:51,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 215 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-15 20:05:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2023-02-15 20:05:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-15 20:05:51,205 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-15 20:05:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:51,205 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-15 20:05:51,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:51,206 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-15 20:05:51,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 20:05:51,206 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:51,206 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:51,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:51,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:51,412 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:51,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1477742247, now seen corresponding path program 30 times [2023-02-15 20:05:51,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:51,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077146649] [2023-02-15 20:05:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:51,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:51,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:51,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077146649] [2023-02-15 20:05:51,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077146649] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:51,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904055990] [2023-02-15 20:05:51,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:05:51,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:51,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:51,582 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:51,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-02-15 20:05:51,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-15 20:05:51,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:51,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:05:51,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:52,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:52,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904055990] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:52,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:52,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2023-02-15 20:05:52,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136005745] [2023-02-15 20:05:52,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:52,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-15 20:05:52,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:52,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-15 20:05:52,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 20:05:52,271 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:52,909 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2023-02-15 20:05:52,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-15 20:05:52,910 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-15 20:05:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:52,910 INFO L225 Difference]: With dead ends: 223 [2023-02-15 20:05:52,910 INFO L226 Difference]: Without dead ends: 189 [2023-02-15 20:05:52,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 51 SyntacticMatches, 21 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1266, Invalid=5874, Unknown=0, NotChecked=0, Total=7140 [2023-02-15 20:05:52,911 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 94 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:52,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 232 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-15 20:05:52,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 67. [2023-02-15 20:05:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-15 20:05:52,979 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-15 20:05:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:52,979 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-15 20:05:52,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-15 20:05:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 20:05:52,979 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:52,980 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:52,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:53,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:53,184 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:53,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1519423272, now seen corresponding path program 31 times [2023-02-15 20:05:53,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:53,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001044185] [2023-02-15 20:05:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:53,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:53,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:53,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001044185] [2023-02-15 20:05:53,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001044185] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:53,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383524435] [2023-02-15 20:05:53,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:05:53,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:53,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:53,411 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:53,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-02-15 20:05:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:05:53,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:53,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:54,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383524435] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:54,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:54,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 46 [2023-02-15 20:05:54,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330207771] [2023-02-15 20:05:54,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:54,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 20:05:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 20:05:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1700, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 20:05:54,069 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:54,786 INFO L93 Difference]: Finished difference Result 262 states and 278 transitions. [2023-02-15 20:05:54,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-15 20:05:54,787 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-15 20:05:54,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:54,787 INFO L225 Difference]: With dead ends: 262 [2023-02-15 20:05:54,787 INFO L226 Difference]: Without dead ends: 228 [2023-02-15 20:05:54,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 52 SyntacticMatches, 21 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1377, Invalid=6455, Unknown=0, NotChecked=0, Total=7832 [2023-02-15 20:05:54,789 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 134 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:54,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 257 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-15 20:05:54,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 67. [2023-02-15 20:05:54,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-15 20:05:54,857 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-15 20:05:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:54,858 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-15 20:05:54,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-15 20:05:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 20:05:54,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:54,858 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:54,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:55,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-02-15 20:05:55,063 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:55,063 INFO L85 PathProgramCache]: Analyzing trace with hash 834536825, now seen corresponding path program 32 times [2023-02-15 20:05:55,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:55,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789492981] [2023-02-15 20:05:55,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:55,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:55,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:55,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789492981] [2023-02-15 20:05:55,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789492981] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:55,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795299546] [2023-02-15 20:05:55,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:05:55,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:55,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:55,229 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:55,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-02-15 20:05:55,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:05:55,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:55,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:05:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:55,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:55,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795299546] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:55,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:55,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2023-02-15 20:05:55,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799465573] [2023-02-15 20:05:55,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:55,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 20:05:55,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:55,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 20:05:55,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 20:05:55,645 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:56,363 INFO L93 Difference]: Finished difference Result 300 states and 317 transitions. [2023-02-15 20:05:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-15 20:05:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-15 20:05:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:56,364 INFO L225 Difference]: With dead ends: 300 [2023-02-15 20:05:56,364 INFO L226 Difference]: Without dead ends: 266 [2023-02-15 20:05:56,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 53 SyntacticMatches, 21 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1435, Invalid=6755, Unknown=0, NotChecked=0, Total=8190 [2023-02-15 20:05:56,365 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 202 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:56,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 256 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-02-15 20:05:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 67. [2023-02-15 20:05:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-15 20:05:56,436 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-15 20:05:56,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:56,436 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-15 20:05:56,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-15 20:05:56,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 20:05:56,437 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:56,437 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:56,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:56,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-02-15 20:05:56,642 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:56,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:56,642 INFO L85 PathProgramCache]: Analyzing trace with hash -890644296, now seen corresponding path program 33 times [2023-02-15 20:05:56,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:56,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146463310] [2023-02-15 20:05:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:56,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:56,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:56,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146463310] [2023-02-15 20:05:56,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146463310] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:56,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191359302] [2023-02-15 20:05:56,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:05:56,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:56,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:56,804 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:56,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-02-15 20:05:56,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-15 20:05:56,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:56,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:05:56,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:57,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:57,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191359302] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:57,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:57,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 44 [2023-02-15 20:05:57,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529076548] [2023-02-15 20:05:57,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:57,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 20:05:57,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:57,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 20:05:57,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 20:05:57,239 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:58,019 INFO L93 Difference]: Finished difference Result 337 states and 355 transitions. [2023-02-15 20:05:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-15 20:05:58,019 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-15 20:05:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:58,020 INFO L225 Difference]: With dead ends: 337 [2023-02-15 20:05:58,020 INFO L226 Difference]: Without dead ends: 303 [2023-02-15 20:05:58,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 54 SyntacticMatches, 21 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1434, Invalid=6756, Unknown=0, NotChecked=0, Total=8190 [2023-02-15 20:05:58,021 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 232 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:58,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 236 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:58,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-02-15 20:05:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 67. [2023-02-15 20:05:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-15 20:05:58,093 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-15 20:05:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:05:58,093 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-15 20:05:58,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-15 20:05:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 20:05:58,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:05:58,094 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:05:58,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-02-15 20:05:58,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-02-15 20:05:58,299 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:05:58,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:05:58,299 INFO L85 PathProgramCache]: Analyzing trace with hash 23536025, now seen corresponding path program 34 times [2023-02-15 20:05:58,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:05:58,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340645182] [2023-02-15 20:05:58,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:05:58,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:05:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:05:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:58,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:05:58,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340645182] [2023-02-15 20:05:58,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340645182] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:05:58,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395664896] [2023-02-15 20:05:58,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:05:58,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:05:58,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:05:58,523 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:05:58,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-02-15 20:05:58,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:05:58,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:05:58,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:05:58,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:05:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:58,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:05:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:05:59,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395664896] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:05:59,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:05:59,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2023-02-15 20:05:59,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966992425] [2023-02-15 20:05:59,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:05:59,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 20:05:59,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:05:59,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 20:05:59,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 20:05:59,138 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:05:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:05:59,976 INFO L93 Difference]: Finished difference Result 373 states and 392 transitions. [2023-02-15 20:05:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-15 20:05:59,976 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-15 20:05:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:05:59,977 INFO L225 Difference]: With dead ends: 373 [2023-02-15 20:05:59,977 INFO L226 Difference]: Without dead ends: 339 [2023-02-15 20:05:59,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 21 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1374, Invalid=6458, Unknown=0, NotChecked=0, Total=7832 [2023-02-15 20:05:59,978 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 238 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:05:59,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 247 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:05:59,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-02-15 20:06:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 67. [2023-02-15 20:06:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-15 20:06:00,046 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-15 20:06:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:00,046 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-15 20:06:00,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-15 20:06:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 20:06:00,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:00,047 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:00,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-02-15 20:06:00,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:00,251 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:00,251 INFO L85 PathProgramCache]: Analyzing trace with hash -778258280, now seen corresponding path program 35 times [2023-02-15 20:06:00,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:00,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783684543] [2023-02-15 20:06:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:00,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:00,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:00,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783684543] [2023-02-15 20:06:00,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783684543] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:00,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665304742] [2023-02-15 20:06:00,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:06:00,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:00,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:00,487 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:00,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-02-15 20:06:00,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-15 20:06:00,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:00,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:06:00,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:00,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:01,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665304742] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:01,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:01,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 42 [2023-02-15 20:06:01,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947749322] [2023-02-15 20:06:01,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:01,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 20:06:01,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:01,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 20:06:01,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 20:06:01,069 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:02,050 INFO L93 Difference]: Finished difference Result 408 states and 428 transitions. [2023-02-15 20:06:02,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-15 20:06:02,051 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-15 20:06:02,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:02,052 INFO L225 Difference]: With dead ends: 408 [2023-02-15 20:06:02,052 INFO L226 Difference]: Without dead ends: 374 [2023-02-15 20:06:02,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 56 SyntacticMatches, 21 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1261, Invalid=5879, Unknown=0, NotChecked=0, Total=7140 [2023-02-15 20:06:02,053 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 249 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:02,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 265 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:02,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-02-15 20:06:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 67. [2023-02-15 20:06:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-15 20:06:02,136 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-15 20:06:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:02,137 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-15 20:06:02,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-15 20:06:02,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 20:06:02,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:02,137 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:02,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-02-15 20:06:02,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:02,342 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:02,342 INFO L85 PathProgramCache]: Analyzing trace with hash 719898041, now seen corresponding path program 36 times [2023-02-15 20:06:02,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:02,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896820047] [2023-02-15 20:06:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:02,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:02,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:02,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896820047] [2023-02-15 20:06:02,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896820047] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:02,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046977116] [2023-02-15 20:06:02,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:06:02,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:02,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:02,549 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:02,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-02-15 20:06:02,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-15 20:06:02,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:02,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:06:02,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:02,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:03,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046977116] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:03,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:03,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2023-02-15 20:06:03,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742399693] [2023-02-15 20:06:03,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:03,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 20:06:03,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:03,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 20:06:03,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 20:06:03,138 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:04,125 INFO L93 Difference]: Finished difference Result 442 states and 463 transitions. [2023-02-15 20:06:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-15 20:06:04,125 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-15 20:06:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:04,126 INFO L225 Difference]: With dead ends: 442 [2023-02-15 20:06:04,126 INFO L226 Difference]: Without dead ends: 408 [2023-02-15 20:06:04,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 57 SyntacticMatches, 21 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1107, Invalid=5055, Unknown=0, NotChecked=0, Total=6162 [2023-02-15 20:06:04,127 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 318 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:04,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 236 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-02-15 20:06:04,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 67. [2023-02-15 20:06:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-02-15 20:06:04,199 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2023-02-15 20:06:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:04,199 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-02-15 20:06:04,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-02-15 20:06:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 20:06:04,200 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:04,200 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:04,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-02-15 20:06:04,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:04,400 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:04,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:04,401 INFO L85 PathProgramCache]: Analyzing trace with hash 491131000, now seen corresponding path program 9 times [2023-02-15 20:06:04,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:04,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884179853] [2023-02-15 20:06:04,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:04,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:04,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:04,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884179853] [2023-02-15 20:06:04,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884179853] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:04,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815530187] [2023-02-15 20:06:04,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:06:04,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:04,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:04,621 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:04,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-02-15 20:06:04,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-15 20:06:04,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:04,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:06:04,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:04,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:05,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815530187] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:05,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:05,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2023-02-15 20:06:05,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541295271] [2023-02-15 20:06:05,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:05,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 20:06:05,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:05,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 20:06:05,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 20:06:05,186 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:06,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:06,142 INFO L93 Difference]: Finished difference Result 478 states and 501 transitions. [2023-02-15 20:06:06,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-15 20:06:06,143 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-15 20:06:06,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:06,144 INFO L225 Difference]: With dead ends: 478 [2023-02-15 20:06:06,144 INFO L226 Difference]: Without dead ends: 444 [2023-02-15 20:06:06,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 21 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=941, Invalid=4029, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 20:06:06,145 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 408 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:06,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 211 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-02-15 20:06:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 69. [2023-02-15 20:06:06,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2023-02-15 20:06:06,220 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 47 [2023-02-15 20:06:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:06,220 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2023-02-15 20:06:06,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2023-02-15 20:06:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 20:06:06,220 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:06,220 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:06,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-02-15 20:06:06,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-02-15 20:06:06,425 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:06,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:06,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1809280333, now seen corresponding path program 18 times [2023-02-15 20:06:06,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:06,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430177016] [2023-02-15 20:06:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:06,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:06,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:06,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430177016] [2023-02-15 20:06:06,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430177016] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:06,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186102240] [2023-02-15 20:06:06,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:06:06,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:06,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:06,566 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:06,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-02-15 20:06:06,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-15 20:06:06,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:06:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:06,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:06,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186102240] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:06,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:06,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2023-02-15 20:06:06,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575217079] [2023-02-15 20:06:06,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:06,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 20:06:06,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:06,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 20:06:06,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-02-15 20:06:06,782 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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 20:06:06,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:06,994 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2023-02-15 20:06:06,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 20:06:06,995 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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 48 [2023-02-15 20:06:06,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:06,995 INFO L225 Difference]: With dead ends: 80 [2023-02-15 20:06:06,995 INFO L226 Difference]: Without dead ends: 78 [2023-02-15 20:06:06,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 20 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2023-02-15 20:06:06,996 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:06,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 182 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:06,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-15 20:06:07,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2023-02-15 20:06:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2023-02-15 20:06:07,078 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 48 [2023-02-15 20:06:07,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:07,079 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2023-02-15 20:06:07,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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 20:06:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2023-02-15 20:06:07,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:06:07,079 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:07,079 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:07,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-02-15 20:06:07,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:07,281 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:07,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:07,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1574007517, now seen corresponding path program 19 times [2023-02-15 20:06:07,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:07,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277332426] [2023-02-15 20:06:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:07,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:07,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:07,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277332426] [2023-02-15 20:06:07,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277332426] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:07,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818577398] [2023-02-15 20:06:07,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:06:07,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:07,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:07,514 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:07,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-02-15 20:06:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:07,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:06:07,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:08,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:08,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818577398] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:08,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:08,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-02-15 20:06:08,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811857651] [2023-02-15 20:06:08,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:08,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 20:06:08,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:08,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 20:06:08,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=2229, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 20:06:08,298 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:08,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:08,815 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2023-02-15 20:06:08,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 20:06:08,815 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 20:06:08,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:08,815 INFO L225 Difference]: With dead ends: 155 [2023-02-15 20:06:08,816 INFO L226 Difference]: Without dead ends: 118 [2023-02-15 20:06:08,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 53 SyntacticMatches, 23 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1107, Invalid=4745, Unknown=0, NotChecked=0, Total=5852 [2023-02-15 20:06:08,816 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 188 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 20:06:08,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 188 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:08,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-15 20:06:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2023-02-15 20:06:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:08,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-15 20:06:08,902 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-15 20:06:08,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:08,902 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-15 20:06:08,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-15 20:06:08,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:06:08,903 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:08,903 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:08,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-02-15 20:06:09,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-02-15 20:06:09,107 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:09,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2142136548, now seen corresponding path program 37 times [2023-02-15 20:06:09,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:09,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928218413] [2023-02-15 20:06:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:09,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:09,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:09,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928218413] [2023-02-15 20:06:09,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928218413] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:09,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298273932] [2023-02-15 20:06:09,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:06:09,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:09,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:09,371 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:09,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-02-15 20:06:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:09,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:06:09,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:09,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:10,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298273932] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:10,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:10,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 52 [2023-02-15 20:06:10,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924253429] [2023-02-15 20:06:10,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:10,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 20:06:10,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:10,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 20:06:10,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2159, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 20:06:10,143 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:10,848 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2023-02-15 20:06:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 20:06:10,848 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 20:06:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:10,849 INFO L225 Difference]: With dead ends: 200 [2023-02-15 20:06:10,849 INFO L226 Difference]: Without dead ends: 163 [2023-02-15 20:06:10,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 54 SyntacticMatches, 23 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3388 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1310, Invalid=6000, Unknown=0, NotChecked=0, Total=7310 [2023-02-15 20:06:10,850 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 215 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 20:06:10,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 215 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-02-15 20:06:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 73. [2023-02-15 20:06:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-15 20:06:10,947 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-15 20:06:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:10,947 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-15 20:06:10,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:10,948 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-15 20:06:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:06:10,948 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:10,948 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:10,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-02-15 20:06:11,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-02-15 20:06:11,152 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:11,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2032955133, now seen corresponding path program 38 times [2023-02-15 20:06:11,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:11,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324830422] [2023-02-15 20:06:11,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:11,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:11,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:11,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324830422] [2023-02-15 20:06:11,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324830422] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:11,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840427751] [2023-02-15 20:06:11,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:06:11,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:11,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:11,410 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:11,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-02-15 20:06:11,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:06:11,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:11,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:06:11,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:11,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:12,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840427751] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:12,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:12,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 51 [2023-02-15 20:06:12,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510483398] [2023-02-15 20:06:12,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:12,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-15 20:06:12,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:12,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-15 20:06:12,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=2087, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 20:06:12,082 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:12,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:12,869 INFO L93 Difference]: Finished difference Result 244 states and 260 transitions. [2023-02-15 20:06:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 20:06:12,869 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 20:06:12,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:12,870 INFO L225 Difference]: With dead ends: 244 [2023-02-15 20:06:12,870 INFO L226 Difference]: Without dead ends: 207 [2023-02-15 20:06:12,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 55 SyntacticMatches, 23 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1505, Invalid=7051, Unknown=0, NotChecked=0, Total=8556 [2023-02-15 20:06:12,871 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 162 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:12,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 280 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:12,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-15 20:06:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 73. [2023-02-15 20:06:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-15 20:06:12,966 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-15 20:06:12,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:12,967 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-15 20:06:12,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-15 20:06:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:06:12,967 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:12,967 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:12,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-02-15 20:06:13,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-02-15 20:06:13,172 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:13,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash 227972860, now seen corresponding path program 39 times [2023-02-15 20:06:13,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:13,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276345541] [2023-02-15 20:06:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:13,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:13,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:13,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276345541] [2023-02-15 20:06:13,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276345541] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:13,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640202481] [2023-02-15 20:06:13,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:06:13,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:13,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:13,358 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:13,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-02-15 20:06:13,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-15 20:06:13,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:06:13,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:13,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:13,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640202481] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:13,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:13,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 50 [2023-02-15 20:06:13,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757149432] [2023-02-15 20:06:13,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:13,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 20:06:13,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 20:06:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 20:06:13,885 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:14,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:14,919 INFO L93 Difference]: Finished difference Result 287 states and 304 transitions. [2023-02-15 20:06:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-15 20:06:14,919 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 20:06:14,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:14,920 INFO L225 Difference]: With dead ends: 287 [2023-02-15 20:06:14,920 INFO L226 Difference]: Without dead ends: 250 [2023-02-15 20:06:14,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 56 SyntacticMatches, 23 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1659, Invalid=7847, Unknown=0, NotChecked=0, Total=9506 [2023-02-15 20:06:14,921 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 147 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:14,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 258 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-02-15 20:06:15,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 73. [2023-02-15 20:06:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-15 20:06:15,026 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-15 20:06:15,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:15,026 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-15 20:06:15,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-15 20:06:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:06:15,026 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:15,027 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:15,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-02-15 20:06:15,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-02-15 20:06:15,231 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:15,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:15,231 INFO L85 PathProgramCache]: Analyzing trace with hash -245894371, now seen corresponding path program 40 times [2023-02-15 20:06:15,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:15,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108860178] [2023-02-15 20:06:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:15,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:15,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:15,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108860178] [2023-02-15 20:06:15,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108860178] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:15,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425226473] [2023-02-15 20:06:15,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:06:15,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:15,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:15,473 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:15,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-02-15 20:06:15,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:06:15,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:15,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:06:15,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:15,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:16,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425226473] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:16,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:16,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2023-02-15 20:06:16,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149663125] [2023-02-15 20:06:16,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:16,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 20:06:16,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:16,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 20:06:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 20:06:16,219 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:17,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:17,403 INFO L93 Difference]: Finished difference Result 329 states and 347 transitions. [2023-02-15 20:06:17,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-15 20:06:17,403 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 20:06:17,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:17,404 INFO L225 Difference]: With dead ends: 329 [2023-02-15 20:06:17,404 INFO L226 Difference]: Without dead ends: 292 [2023-02-15 20:06:17,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 57 SyntacticMatches, 23 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1757, Invalid=8343, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 20:06:17,405 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 194 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:17,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 302 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:17,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-02-15 20:06:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 73. [2023-02-15 20:06:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-15 20:06:17,506 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-15 20:06:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:17,506 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-15 20:06:17,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-15 20:06:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:06:17,507 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:17,507 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:17,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-02-15 20:06:17,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:17,711 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:17,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1646653732, now seen corresponding path program 41 times [2023-02-15 20:06:17,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:17,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777111473] [2023-02-15 20:06:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:17,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 127 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:17,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:17,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777111473] [2023-02-15 20:06:17,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777111473] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:17,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78488004] [2023-02-15 20:06:17,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:06:17,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:17,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:17,960 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:17,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-02-15 20:06:18,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-02-15 20:06:18,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:18,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:06:18,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:18,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:18,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78488004] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:18,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:18,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 48 [2023-02-15 20:06:18,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633789540] [2023-02-15 20:06:18,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:18,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 20:06:18,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:18,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 20:06:18,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 20:06:18,532 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:19,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:19,649 INFO L93 Difference]: Finished difference Result 370 states and 389 transitions. [2023-02-15 20:06:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-15 20:06:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 20:06:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:19,650 INFO L225 Difference]: With dead ends: 370 [2023-02-15 20:06:19,651 INFO L226 Difference]: Without dead ends: 333 [2023-02-15 20:06:19,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 58 SyntacticMatches, 23 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4258 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1790, Invalid=8512, Unknown=0, NotChecked=0, Total=10302 [2023-02-15 20:06:19,651 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 275 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:19,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 270 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-02-15 20:06:19,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 73. [2023-02-15 20:06:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-15 20:06:19,760 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-15 20:06:19,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:19,760 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-15 20:06:19,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-15 20:06:19,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:06:19,761 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:19,761 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:19,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-02-15 20:06:19,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:19,965 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:19,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1356201789, now seen corresponding path program 42 times [2023-02-15 20:06:19,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:19,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333495700] [2023-02-15 20:06:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:19,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:20,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:20,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333495700] [2023-02-15 20:06:20,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333495700] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:20,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615191948] [2023-02-15 20:06:20,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:06:20,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:20,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:20,142 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:20,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-02-15 20:06:20,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-02-15 20:06:20,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:20,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:06:20,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:20,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:20,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615191948] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:20,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:20,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 47 [2023-02-15 20:06:20,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436856771] [2023-02-15 20:06:20,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:20,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-15 20:06:20,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:20,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-15 20:06:20,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 20:06:20,685 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:21,850 INFO L93 Difference]: Finished difference Result 410 states and 430 transitions. [2023-02-15 20:06:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-15 20:06:21,850 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 20:06:21,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:21,851 INFO L225 Difference]: With dead ends: 410 [2023-02-15 20:06:21,851 INFO L226 Difference]: Without dead ends: 373 [2023-02-15 20:06:21,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 59 SyntacticMatches, 23 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1755, Invalid=8345, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 20:06:21,852 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 249 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:21,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 238 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-02-15 20:06:21,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 73. [2023-02-15 20:06:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:21,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-15 20:06:21,962 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-15 20:06:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:21,963 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-15 20:06:21,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:21,963 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-15 20:06:21,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:06:21,963 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:21,963 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:21,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-02-15 20:06:22,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:22,168 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:22,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:22,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1314520764, now seen corresponding path program 43 times [2023-02-15 20:06:22,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:22,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140628161] [2023-02-15 20:06:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:22,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:22,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:22,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140628161] [2023-02-15 20:06:22,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140628161] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:22,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759415003] [2023-02-15 20:06:22,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:06:22,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:22,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:22,473 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:22,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-02-15 20:06:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:22,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:06:22,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:22,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:23,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759415003] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:23,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:23,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 46 [2023-02-15 20:06:23,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998751563] [2023-02-15 20:06:23,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:23,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 20:06:23,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 20:06:23,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 20:06:23,142 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:24,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:24,490 INFO L93 Difference]: Finished difference Result 449 states and 470 transitions. [2023-02-15 20:06:24,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-15 20:06:24,490 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 20:06:24,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:24,491 INFO L225 Difference]: With dead ends: 449 [2023-02-15 20:06:24,491 INFO L226 Difference]: Without dead ends: 412 [2023-02-15 20:06:24,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 60 SyntacticMatches, 23 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3857 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1655, Invalid=7851, Unknown=0, NotChecked=0, Total=9506 [2023-02-15 20:06:24,492 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 373 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:24,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 281 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:24,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-15 20:06:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 73. [2023-02-15 20:06:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-15 20:06:24,619 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-15 20:06:24,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:24,619 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-15 20:06:24,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-15 20:06:24,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:06:24,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:24,620 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:24,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-02-15 20:06:24,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-02-15 20:06:24,824 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash -626486435, now seen corresponding path program 44 times [2023-02-15 20:06:24,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:24,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079739322] [2023-02-15 20:06:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:25,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:25,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079739322] [2023-02-15 20:06:25,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079739322] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:25,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129054593] [2023-02-15 20:06:25,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:06:25,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:25,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:25,069 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:25,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-02-15 20:06:25,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:06:25,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:25,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:06:25,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:25,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:25,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129054593] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:25,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:25,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2023-02-15 20:06:25,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092660256] [2023-02-15 20:06:25,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:25,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 20:06:25,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:25,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 20:06:25,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 20:06:25,718 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:27,109 INFO L93 Difference]: Finished difference Result 487 states and 509 transitions. [2023-02-15 20:06:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-15 20:06:27,109 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 20:06:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:27,110 INFO L225 Difference]: With dead ends: 487 [2023-02-15 20:06:27,111 INFO L226 Difference]: Without dead ends: 450 [2023-02-15 20:06:27,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 61 SyntacticMatches, 23 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3435 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1499, Invalid=7057, Unknown=0, NotChecked=0, Total=8556 [2023-02-15 20:06:27,111 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 354 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:27,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 323 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:27,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-02-15 20:06:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 73. [2023-02-15 20:06:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-15 20:06:27,232 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-15 20:06:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:27,232 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-15 20:06:27,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:27,232 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-15 20:06:27,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:06:27,233 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:27,233 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:27,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-02-15 20:06:27,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:27,437 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:27,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1943299740, now seen corresponding path program 45 times [2023-02-15 20:06:27,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:27,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890779115] [2023-02-15 20:06:27,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:27,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:27,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:27,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890779115] [2023-02-15 20:06:27,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890779115] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:27,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822458824] [2023-02-15 20:06:27,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:06:27,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:27,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:27,613 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:27,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-02-15 20:06:27,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-15 20:06:27,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:06:27,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:27,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:28,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822458824] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:28,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:28,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 44 [2023-02-15 20:06:28,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86231778] [2023-02-15 20:06:28,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:28,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 20:06:28,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:28,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 20:06:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 20:06:28,069 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:29,498 INFO L93 Difference]: Finished difference Result 524 states and 547 transitions. [2023-02-15 20:06:29,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-15 20:06:29,498 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 20:06:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:29,499 INFO L225 Difference]: With dead ends: 524 [2023-02-15 20:06:29,500 INFO L226 Difference]: Without dead ends: 487 [2023-02-15 20:06:29,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 62 SyntacticMatches, 23 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1302, Invalid=6008, Unknown=0, NotChecked=0, Total=7310 [2023-02-15 20:06:29,500 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 423 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:29,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 287 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:29,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-02-15 20:06:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 73. [2023-02-15 20:06:29,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2023-02-15 20:06:29,614 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2023-02-15 20:06:29,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:29,614 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2023-02-15 20:06:29,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2023-02-15 20:06:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:06:29,615 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:29,615 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:29,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-02-15 20:06:29,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:29,818 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:29,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1437487235, now seen corresponding path program 10 times [2023-02-15 20:06:29,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:29,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766516611] [2023-02-15 20:06:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:29,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:30,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:30,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766516611] [2023-02-15 20:06:30,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766516611] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:30,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214026647] [2023-02-15 20:06:30,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:06:30,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:30,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:30,108 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:30,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-02-15 20:06:30,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:06:30,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:30,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:06:30,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:30,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:30,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214026647] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:30,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:30,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 43 [2023-02-15 20:06:30,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334069339] [2023-02-15 20:06:30,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:30,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 20:06:30,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:30,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 20:06:30,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1439, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 20:06:30,717 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:32,140 INFO L93 Difference]: Finished difference Result 563 states and 588 transitions. [2023-02-15 20:06:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 20:06:32,140 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 20:06:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:32,141 INFO L225 Difference]: With dead ends: 563 [2023-02-15 20:06:32,141 INFO L226 Difference]: Without dead ends: 526 [2023-02-15 20:06:32,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 63 SyntacticMatches, 23 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1097, Invalid=4755, Unknown=0, NotChecked=0, Total=5852 [2023-02-15 20:06:32,142 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 340 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:32,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 266 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-02-15 20:06:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 75. [2023-02-15 20:06:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2023-02-15 20:06:32,275 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 51 [2023-02-15 20:06:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:32,276 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2023-02-15 20:06:32,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2023-02-15 20:06:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 20:06:32,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:32,276 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:32,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-02-15 20:06:32,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-02-15 20:06:32,481 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:32,482 INFO L85 PathProgramCache]: Analyzing trace with hash -723168425, now seen corresponding path program 20 times [2023-02-15 20:06:32,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:32,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178982083] [2023-02-15 20:06:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:32,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:32,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:32,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178982083] [2023-02-15 20:06:32,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178982083] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:32,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455590986] [2023-02-15 20:06:32,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:06:32,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:32,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:32,659 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:32,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-02-15 20:06:32,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:06:32,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:32,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:06:32,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:32,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:32,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455590986] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:32,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:32,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2023-02-15 20:06:32,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170314453] [2023-02-15 20:06:32,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:32,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 20:06:32,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:32,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 20:06:32,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:06:32,956 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:33,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:33,222 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2023-02-15 20:06:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 20:06:33,223 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-15 20:06:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:33,223 INFO L225 Difference]: With dead ends: 86 [2023-02-15 20:06:33,223 INFO L226 Difference]: Without dead ends: 84 [2023-02-15 20:06:33,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 90 SyntacticMatches, 22 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2023-02-15 20:06:33,224 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 74 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:33,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 168 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-15 20:06:33,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2023-02-15 20:06:33,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:33,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2023-02-15 20:06:33,345 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 52 [2023-02-15 20:06:33,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:33,345 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2023-02-15 20:06:33,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:33,346 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2023-02-15 20:06:33,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 20:06:33,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:33,346 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:33,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-02-15 20:06:33,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-02-15 20:06:33,550 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:33,551 INFO L85 PathProgramCache]: Analyzing trace with hash -349749319, now seen corresponding path program 21 times [2023-02-15 20:06:33,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:33,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724183236] [2023-02-15 20:06:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:33,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:33,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:33,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724183236] [2023-02-15 20:06:33,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724183236] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:33,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887233165] [2023-02-15 20:06:33,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:06:33,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:33,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:33,812 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:33,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-02-15 20:06:33,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-15 20:06:33,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:06:33,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:34,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:34,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887233165] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:34,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:34,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2023-02-15 20:06:34,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263264356] [2023-02-15 20:06:34,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:34,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-15 20:06:34,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-15 20:06:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=2583, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 20:06:34,544 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:35,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:35,088 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2023-02-15 20:06:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 20:06:35,089 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 20:06:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:35,089 INFO L225 Difference]: With dead ends: 168 [2023-02-15 20:06:35,089 INFO L226 Difference]: Without dead ends: 128 [2023-02-15 20:06:35,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 57 SyntacticMatches, 25 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3462 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1276, Invalid=5530, Unknown=0, NotChecked=0, Total=6806 [2023-02-15 20:06:35,090 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:35,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 218 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-15 20:06:35,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2023-02-15 20:06:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-15 20:06:35,232 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-15 20:06:35,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:35,232 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-15 20:06:35,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:35,232 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-15 20:06:35,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 20:06:35,233 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:35,233 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:35,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-02-15 20:06:35,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:35,437 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:35,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:35,437 INFO L85 PathProgramCache]: Analyzing trace with hash -865260424, now seen corresponding path program 46 times [2023-02-15 20:06:35,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:35,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018363581] [2023-02-15 20:06:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:35,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:35,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:35,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018363581] [2023-02-15 20:06:35,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018363581] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:35,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877885808] [2023-02-15 20:06:35,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:06:35,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:35,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:35,638 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:35,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-02-15 20:06:35,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:06:35,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:35,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:06:35,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:36,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:36,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877885808] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:36,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:36,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2023-02-15 20:06:36,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936204929] [2023-02-15 20:06:36,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:36,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-15 20:06:36,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:36,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-15 20:06:36,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=2508, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 20:06:36,341 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:37,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:37,145 INFO L93 Difference]: Finished difference Result 217 states and 233 transitions. [2023-02-15 20:06:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 20:06:37,145 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 20:06:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:37,146 INFO L225 Difference]: With dead ends: 217 [2023-02-15 20:06:37,146 INFO L226 Difference]: Without dead ends: 177 [2023-02-15 20:06:37,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 25 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4016 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1522, Invalid=7034, Unknown=0, NotChecked=0, Total=8556 [2023-02-15 20:06:37,147 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 102 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:37,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 227 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-15 20:06:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 79. [2023-02-15 20:06:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-15 20:06:37,302 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-15 20:06:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:37,302 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-15 20:06:37,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-15 20:06:37,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 20:06:37,303 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:37,303 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:37,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-02-15 20:06:37,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:37,508 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:37,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:37,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1436079143, now seen corresponding path program 47 times [2023-02-15 20:06:37,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:37,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471145036] [2023-02-15 20:06:37,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:37,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:37,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:37,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471145036] [2023-02-15 20:06:37,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471145036] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:37,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797092121] [2023-02-15 20:06:37,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:06:37,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:37,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:37,745 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:37,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-02-15 20:06:37,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-15 20:06:37,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:37,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:06:37,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:38,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:38,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797092121] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:38,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:38,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 55 [2023-02-15 20:06:38,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549950573] [2023-02-15 20:06:38,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:38,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-15 20:06:38,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:38,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-15 20:06:38,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2431, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 20:06:38,602 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:39,591 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2023-02-15 20:06:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 20:06:39,592 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 20:06:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:39,592 INFO L225 Difference]: With dead ends: 265 [2023-02-15 20:06:39,592 INFO L226 Difference]: Without dead ends: 225 [2023-02-15 20:06:39,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 59 SyntacticMatches, 25 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1765, Invalid=8335, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 20:06:39,594 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 100 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:39,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 304 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:39,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-02-15 20:06:39,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 79. [2023-02-15 20:06:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-15 20:06:39,747 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-15 20:06:39,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:39,747 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-15 20:06:39,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-15 20:06:39,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 20:06:39,747 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:39,748 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:39,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-02-15 20:06:39,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-02-15 20:06:39,952 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:39,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:39,952 INFO L85 PathProgramCache]: Analyzing trace with hash 762264664, now seen corresponding path program 48 times [2023-02-15 20:06:39,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:39,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629306722] [2023-02-15 20:06:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:39,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:40,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:40,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629306722] [2023-02-15 20:06:40,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629306722] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:40,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999774772] [2023-02-15 20:06:40,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:06:40,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:40,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:40,233 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:40,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-02-15 20:06:40,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-02-15 20:06:40,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:40,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:06:40,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:40,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:40,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999774772] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:40,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:40,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 54 [2023-02-15 20:06:40,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444092247] [2023-02-15 20:06:40,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:40,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-15 20:06:40,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:40,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-15 20:06:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 20:06:40,771 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:41,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:41,947 INFO L93 Difference]: Finished difference Result 312 states and 330 transitions. [2023-02-15 20:06:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-15 20:06:41,948 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 20:06:41,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:41,948 INFO L225 Difference]: With dead ends: 312 [2023-02-15 20:06:41,948 INFO L226 Difference]: Without dead ends: 272 [2023-02-15 20:06:41,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 60 SyntacticMatches, 25 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4907 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1968, Invalid=9374, Unknown=0, NotChecked=0, Total=11342 [2023-02-15 20:06:41,949 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 144 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:41,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 286 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-15 20:06:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 79. [2023-02-15 20:06:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-15 20:06:42,097 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-15 20:06:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:42,097 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-15 20:06:42,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-15 20:06:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 20:06:42,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:42,098 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:42,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-02-15 20:06:42,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:42,302 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:42,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:42,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1525915641, now seen corresponding path program 49 times [2023-02-15 20:06:42,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:42,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797286647] [2023-02-15 20:06:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:42,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:42,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:42,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797286647] [2023-02-15 20:06:42,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797286647] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:42,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898784155] [2023-02-15 20:06:42,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:06:42,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:42,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:42,502 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:42,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-02-15 20:06:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:42,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:06:42,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:42,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:43,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898784155] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:43,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:43,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2023-02-15 20:06:43,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327538574] [2023-02-15 20:06:43,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:43,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 20:06:43,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:43,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 20:06:43,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2271, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 20:06:43,062 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:44,416 INFO L93 Difference]: Finished difference Result 358 states and 377 transitions. [2023-02-15 20:06:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-15 20:06:44,417 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 20:06:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:44,417 INFO L225 Difference]: With dead ends: 358 [2023-02-15 20:06:44,417 INFO L226 Difference]: Without dead ends: 318 [2023-02-15 20:06:44,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 61 SyntacticMatches, 25 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2113, Invalid=10097, Unknown=0, NotChecked=0, Total=12210 [2023-02-15 20:06:44,418 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 274 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:44,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 331 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:44,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-02-15 20:06:44,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 79. [2023-02-15 20:06:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-15 20:06:44,568 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-15 20:06:44,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:44,568 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-15 20:06:44,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:44,569 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-15 20:06:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 20:06:44,569 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:44,569 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:44,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2023-02-15 20:06:44,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:44,773 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:44,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2104738872, now seen corresponding path program 50 times [2023-02-15 20:06:44,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:44,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663893236] [2023-02-15 20:06:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:44,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:44,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:44,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663893236] [2023-02-15 20:06:44,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663893236] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:44,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770310584] [2023-02-15 20:06:44,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:06:44,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:44,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:44,972 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:44,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-02-15 20:06:45,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:06:45,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:45,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:06:45,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:45,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:45,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770310584] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:45,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:45,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 52 [2023-02-15 20:06:45,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075442127] [2023-02-15 20:06:45,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:45,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 20:06:45,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:45,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 20:06:45,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 20:06:45,510 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:47,105 INFO L93 Difference]: Finished difference Result 403 states and 423 transitions. [2023-02-15 20:06:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-15 20:06:47,106 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 20:06:47,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:47,106 INFO L225 Difference]: With dead ends: 403 [2023-02-15 20:06:47,107 INFO L226 Difference]: Without dead ends: 363 [2023-02-15 20:06:47,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 62 SyntacticMatches, 25 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5293 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2188, Invalid=10468, Unknown=0, NotChecked=0, Total=12656 [2023-02-15 20:06:47,108 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 237 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:47,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 300 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-02-15 20:06:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 79. [2023-02-15 20:06:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-15 20:06:47,283 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-15 20:06:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:47,283 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-15 20:06:47,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-15 20:06:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 20:06:47,284 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:47,284 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:47,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2023-02-15 20:06:47,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2023-02-15 20:06:47,489 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:47,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:47,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1984863257, now seen corresponding path program 51 times [2023-02-15 20:06:47,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:47,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886886449] [2023-02-15 20:06:47,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:47,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:47,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:47,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886886449] [2023-02-15 20:06:47,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886886449] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:47,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88569671] [2023-02-15 20:06:47,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:06:47,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:47,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:47,737 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:47,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-02-15 20:06:47,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-15 20:06:47,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:06:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:48,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:48,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88569671] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:48,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:48,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 51 [2023-02-15 20:06:48,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715105834] [2023-02-15 20:06:48,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:48,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-15 20:06:48,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:48,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-15 20:06:48,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2103, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 20:06:48,509 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:50,374 INFO L93 Difference]: Finished difference Result 447 states and 468 transitions. [2023-02-15 20:06:50,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-15 20:06:50,374 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 20:06:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:50,375 INFO L225 Difference]: With dead ends: 447 [2023-02-15 20:06:50,375 INFO L226 Difference]: Without dead ends: 407 [2023-02-15 20:06:50,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 63 SyntacticMatches, 25 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2187, Invalid=10469, Unknown=0, NotChecked=0, Total=12656 [2023-02-15 20:06:50,376 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 268 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:50,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 324 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:50,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-02-15 20:06:50,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 79. [2023-02-15 20:06:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-15 20:06:50,531 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-15 20:06:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:50,531 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-15 20:06:50,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-15 20:06:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 20:06:50,531 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:50,531 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:50,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2023-02-15 20:06:50,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:50,736 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:50,736 INFO L85 PathProgramCache]: Analyzing trace with hash 179880984, now seen corresponding path program 52 times [2023-02-15 20:06:50,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:50,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822250729] [2023-02-15 20:06:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:50,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:51,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:51,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822250729] [2023-02-15 20:06:51,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822250729] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:51,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950763283] [2023-02-15 20:06:51,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:06:51,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:51,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:51,018 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:51,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-02-15 20:06:51,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:06:51,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:51,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:06:51,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:51,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:51,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950763283] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:51,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:51,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 50 [2023-02-15 20:06:51,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302949333] [2023-02-15 20:06:51,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:51,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 20:06:51,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:51,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 20:06:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 20:06:51,797 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:53,731 INFO L93 Difference]: Finished difference Result 490 states and 512 transitions. [2023-02-15 20:06:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-15 20:06:53,731 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 20:06:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:53,733 INFO L225 Difference]: With dead ends: 490 [2023-02-15 20:06:53,733 INFO L226 Difference]: Without dead ends: 450 [2023-02-15 20:06:53,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 64 SyntacticMatches, 25 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2110, Invalid=10100, Unknown=0, NotChecked=0, Total=12210 [2023-02-15 20:06:53,734 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 303 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:53,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 290 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-02-15 20:06:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 79. [2023-02-15 20:06:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-15 20:06:53,900 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-15 20:06:53,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:53,900 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-15 20:06:53,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:53,901 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-15 20:06:53,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 20:06:53,901 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:53,901 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:53,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2023-02-15 20:06:54,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:54,105 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:54,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:54,105 INFO L85 PathProgramCache]: Analyzing trace with hash -293986247, now seen corresponding path program 53 times [2023-02-15 20:06:54,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:54,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753122865] [2023-02-15 20:06:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:54,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:54,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:54,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753122865] [2023-02-15 20:06:54,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753122865] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:54,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762222845] [2023-02-15 20:06:54,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:06:54,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:54,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:54,371 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:54,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-02-15 20:06:54,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-15 20:06:54,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:54,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:06:54,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:54,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:55,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762222845] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:55,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:55,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 49 [2023-02-15 20:06:55,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328632013] [2023-02-15 20:06:55,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:55,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 20:06:55,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:55,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 20:06:55,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1927, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 20:06:55,065 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:06:56,976 INFO L93 Difference]: Finished difference Result 532 states and 555 transitions. [2023-02-15 20:06:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-15 20:06:56,976 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 20:06:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:06:56,977 INFO L225 Difference]: With dead ends: 532 [2023-02-15 20:06:56,977 INFO L226 Difference]: Without dead ends: 492 [2023-02-15 20:06:56,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 25 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4632 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1963, Invalid=9379, Unknown=0, NotChecked=0, Total=11342 [2023-02-15 20:06:56,978 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 326 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:06:56,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 290 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:06:56,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-02-15 20:06:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 79. [2023-02-15 20:06:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-15 20:06:57,140 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-15 20:06:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:06:57,141 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-15 20:06:57,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:06:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-15 20:06:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 20:06:57,141 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:06:57,141 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:06:57,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-02-15 20:06:57,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:57,346 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:06:57,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:06:57,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1694745608, now seen corresponding path program 54 times [2023-02-15 20:06:57,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:06:57,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483955737] [2023-02-15 20:06:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:06:57,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:06:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:06:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:57,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:06:57,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483955737] [2023-02-15 20:06:57,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483955737] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:06:57,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271100492] [2023-02-15 20:06:57,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:06:57,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:06:57,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:06:57,630 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:06:57,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-02-15 20:06:57,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-02-15 20:06:57,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:06:57,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:06:57,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:06:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:58,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:06:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:06:58,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271100492] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:06:58,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:06:58,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2023-02-15 20:06:58,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420262908] [2023-02-15 20:06:58,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:06:58,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 20:06:58,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:06:58,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 20:06:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 20:06:58,288 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:00,174 INFO L93 Difference]: Finished difference Result 573 states and 597 transitions. [2023-02-15 20:07:00,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-15 20:07:00,175 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 20:07:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:00,176 INFO L225 Difference]: With dead ends: 573 [2023-02-15 20:07:00,176 INFO L226 Difference]: Without dead ends: 533 [2023-02-15 20:07:00,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 66 SyntacticMatches, 25 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1758, Invalid=8342, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 20:07:00,177 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 376 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:00,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 330 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-02-15 20:07:00,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 79. [2023-02-15 20:07:00,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-15 20:07:00,343 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-15 20:07:00,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:00,344 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-15 20:07:00,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-15 20:07:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 20:07:00,344 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:00,344 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:00,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2023-02-15 20:07:00,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:00,549 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:00,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:00,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1308109913, now seen corresponding path program 55 times [2023-02-15 20:07:00,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:00,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976188826] [2023-02-15 20:07:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:00,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:00,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:00,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976188826] [2023-02-15 20:07:00,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976188826] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:00,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180364051] [2023-02-15 20:07:00,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:07:00,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:00,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:00,796 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:00,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-02-15 20:07:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:00,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:07:00,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:01,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:01,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180364051] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:01,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:01,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2023-02-15 20:07:01,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283839789] [2023-02-15 20:07:01,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:01,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-15 20:07:01,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:01,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-15 20:07:01,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 20:07:01,429 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:03,516 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2023-02-15 20:07:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-15 20:07:03,516 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 20:07:03,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:03,518 INFO L225 Difference]: With dead ends: 613 [2023-02-15 20:07:03,518 INFO L226 Difference]: Without dead ends: 573 [2023-02-15 20:07:03,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 67 SyntacticMatches, 25 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3382 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1513, Invalid=7043, Unknown=0, NotChecked=0, Total=8556 [2023-02-15 20:07:03,518 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 336 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:03,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 310 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2023-02-15 20:07:03,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 79. [2023-02-15 20:07:03,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-02-15 20:07:03,686 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2023-02-15 20:07:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:03,686 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-02-15 20:07:03,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-02-15 20:07:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 20:07:03,687 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:03,687 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:03,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2023-02-15 20:07:03,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:03,891 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:03,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:03,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1266428888, now seen corresponding path program 11 times [2023-02-15 20:07:03,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:03,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314837148] [2023-02-15 20:07:03,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:03,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:04,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:04,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314837148] [2023-02-15 20:07:04,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314837148] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:04,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000783908] [2023-02-15 20:07:04,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:07:04,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:04,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:04,181 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:04,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-02-15 20:07:04,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-15 20:07:04,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:04,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:07:04,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:04,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:04,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000783908] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:04,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:04,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2023-02-15 20:07:04,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139594367] [2023-02-15 20:07:04,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:04,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 20:07:04,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 20:07:04,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1648, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 20:07:04,913 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:06,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:06,994 INFO L93 Difference]: Finished difference Result 655 states and 682 transitions. [2023-02-15 20:07:06,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 20:07:06,994 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 20:07:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:06,996 INFO L225 Difference]: With dead ends: 655 [2023-02-15 20:07:06,996 INFO L226 Difference]: Without dead ends: 615 [2023-02-15 20:07:06,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 68 SyntacticMatches, 25 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1265, Invalid=5541, Unknown=0, NotChecked=0, Total=6806 [2023-02-15 20:07:06,996 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 382 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:06,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 247 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:06,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-02-15 20:07:07,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 81. [2023-02-15 20:07:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1875) internal successors, (95), 80 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2023-02-15 20:07:07,171 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 55 [2023-02-15 20:07:07,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:07,171 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2023-02-15 20:07:07,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2023-02-15 20:07:07,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 20:07:07,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:07,172 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:07,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2023-02-15 20:07:07,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2023-02-15 20:07:07,376 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:07,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:07,377 INFO L85 PathProgramCache]: Analyzing trace with hash -66956493, now seen corresponding path program 22 times [2023-02-15 20:07:07,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:07,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064742802] [2023-02-15 20:07:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:07,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064742802] [2023-02-15 20:07:07,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064742802] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922519818] [2023-02-15 20:07:07,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:07:07,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:07,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:07,542 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:07,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-02-15 20:07:07,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:07:07,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:07,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:07,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:07,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:07,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922519818] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:07,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:07,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2023-02-15 20:07:07,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741595162] [2023-02-15 20:07:07,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:07,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:07:07,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:07,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:07:07,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:07:07,835 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:08,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:08,186 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2023-02-15 20:07:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 20:07:08,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-15 20:07:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:08,187 INFO L225 Difference]: With dead ends: 92 [2023-02-15 20:07:08,187 INFO L226 Difference]: Without dead ends: 90 [2023-02-15 20:07:08,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 24 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2023-02-15 20:07:08,189 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:08,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 174 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:08,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-15 20:07:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2023-02-15 20:07:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.180722891566265) internal successors, (98), 83 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2023-02-15 20:07:08,370 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 56 [2023-02-15 20:07:08,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:08,370 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2023-02-15 20:07:08,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:08,371 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2023-02-15 20:07:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:07:08,371 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:08,371 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:08,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2023-02-15 20:07:08,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-02-15 20:07:08,575 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:08,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:08,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1831214499, now seen corresponding path program 23 times [2023-02-15 20:07:08,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:08,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191664091] [2023-02-15 20:07:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:08,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:08,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:08,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191664091] [2023-02-15 20:07:08,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191664091] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418159747] [2023-02-15 20:07:08,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:07:08,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:08,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:08,881 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:08,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-02-15 20:07:08,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-15 20:07:08,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:08,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:09,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:09,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418159747] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:09,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:09,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2023-02-15 20:07:09,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870748658] [2023-02-15 20:07:09,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:09,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-15 20:07:09,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:09,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-15 20:07:09,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=2963, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 20:07:09,778 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:10,508 INFO L93 Difference]: Finished difference Result 181 states and 197 transitions. [2023-02-15 20:07:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 20:07:10,508 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 20:07:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:10,509 INFO L225 Difference]: With dead ends: 181 [2023-02-15 20:07:10,509 INFO L226 Difference]: Without dead ends: 138 [2023-02-15 20:07:10,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 61 SyntacticMatches, 27 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4031 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1457, Invalid=6375, Unknown=0, NotChecked=0, Total=7832 [2023-02-15 20:07:10,510 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 73 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:10,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 217 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-15 20:07:10,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 85. [2023-02-15 20:07:10,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-15 20:07:10,705 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-15 20:07:10,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:10,705 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-15 20:07:10,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:10,705 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-15 20:07:10,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:07:10,706 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:10,706 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:10,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2023-02-15 20:07:10,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:10,910 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:10,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:10,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1372411804, now seen corresponding path program 56 times [2023-02-15 20:07:10,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:10,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461138498] [2023-02-15 20:07:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:10,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:11,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:11,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461138498] [2023-02-15 20:07:11,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461138498] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:11,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980930425] [2023-02-15 20:07:11,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:07:11,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:11,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:11,243 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:11,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-02-15 20:07:11,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:07:11,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:11,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:11,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:11,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:11,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980930425] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:11,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:11,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 60 [2023-02-15 20:07:11,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610227215] [2023-02-15 20:07:11,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:11,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-15 20:07:11,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-15 20:07:11,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=2883, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 20:07:11,964 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:12,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:12,984 INFO L93 Difference]: Finished difference Result 234 states and 251 transitions. [2023-02-15 20:07:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 20:07:12,984 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 20:07:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:12,985 INFO L225 Difference]: With dead ends: 234 [2023-02-15 20:07:12,985 INFO L226 Difference]: Without dead ends: 191 [2023-02-15 20:07:12,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 62 SyntacticMatches, 27 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4697 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1750, Invalid=8150, Unknown=0, NotChecked=0, Total=9900 [2023-02-15 20:07:12,986 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 75 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:12,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 255 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:12,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-02-15 20:07:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 85. [2023-02-15 20:07:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:13,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-15 20:07:13,196 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-15 20:07:13,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:13,197 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-15 20:07:13,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:13,197 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-15 20:07:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:07:13,197 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:13,197 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:13,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2023-02-15 20:07:13,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:13,401 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:13,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:13,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1710834051, now seen corresponding path program 57 times [2023-02-15 20:07:13,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:13,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925490074] [2023-02-15 20:07:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:13,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:13,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:13,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925490074] [2023-02-15 20:07:13,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925490074] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:13,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895209198] [2023-02-15 20:07:13,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:07:13,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:13,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:13,721 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:13,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2023-02-15 20:07:13,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-02-15 20:07:13,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:13,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:13,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:14,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:14,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895209198] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:14,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:14,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 59 [2023-02-15 20:07:14,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114317294] [2023-02-15 20:07:14,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:14,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-15 20:07:14,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:14,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-15 20:07:14,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2801, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 20:07:14,676 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:16,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:16,081 INFO L93 Difference]: Finished difference Result 286 states and 304 transitions. [2023-02-15 20:07:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-15 20:07:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 20:07:16,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:16,082 INFO L225 Difference]: With dead ends: 286 [2023-02-15 20:07:16,082 INFO L226 Difference]: Without dead ends: 243 [2023-02-15 20:07:16,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 63 SyntacticMatches, 27 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5312 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2046, Invalid=9726, Unknown=0, NotChecked=0, Total=11772 [2023-02-15 20:07:16,083 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 145 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:16,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 238 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-02-15 20:07:16,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 85. [2023-02-15 20:07:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-15 20:07:16,303 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-15 20:07:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:16,304 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-15 20:07:16,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:16,304 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-15 20:07:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:07:16,304 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:16,304 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:16,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2023-02-15 20:07:16,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:16,509 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:16,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1099200380, now seen corresponding path program 58 times [2023-02-15 20:07:16,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:16,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140932808] [2023-02-15 20:07:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:16,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:16,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:16,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140932808] [2023-02-15 20:07:16,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140932808] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:16,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775178231] [2023-02-15 20:07:16,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:07:16,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:16,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:16,789 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:16,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2023-02-15 20:07:16,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:07:16,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:16,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:16,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:17,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:17,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775178231] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:17,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:17,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 58 [2023-02-15 20:07:17,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720865194] [2023-02-15 20:07:17,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:17,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-15 20:07:17,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:17,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-15 20:07:17,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=2717, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 20:07:17,607 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:19,164 INFO L93 Difference]: Finished difference Result 337 states and 356 transitions. [2023-02-15 20:07:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-15 20:07:19,164 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 20:07:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:19,165 INFO L225 Difference]: With dead ends: 337 [2023-02-15 20:07:19,165 INFO L226 Difference]: Without dead ends: 294 [2023-02-15 20:07:19,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 64 SyntacticMatches, 27 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5828 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2304, Invalid=11036, Unknown=0, NotChecked=0, Total=13340 [2023-02-15 20:07:19,166 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 189 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:19,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 236 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-02-15 20:07:19,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 85. [2023-02-15 20:07:19,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-15 20:07:19,388 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-15 20:07:19,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:19,388 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-15 20:07:19,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-15 20:07:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:07:19,402 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:19,402 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:19,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2023-02-15 20:07:19,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:19,602 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:19,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1996741987, now seen corresponding path program 59 times [2023-02-15 20:07:19,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:19,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993813350] [2023-02-15 20:07:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:19,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:19,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:19,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993813350] [2023-02-15 20:07:19,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993813350] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:19,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959811340] [2023-02-15 20:07:19,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:07:19,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:19,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:19,895 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:19,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2023-02-15 20:07:19,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-15 20:07:19,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:19,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:20,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:20,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959811340] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:20,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:20,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2023-02-15 20:07:20,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683052723] [2023-02-15 20:07:20,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:20,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-15 20:07:20,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:20,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-15 20:07:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 20:07:20,564 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:22,577 INFO L93 Difference]: Finished difference Result 387 states and 407 transitions. [2023-02-15 20:07:22,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-15 20:07:22,577 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 20:07:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:22,578 INFO L225 Difference]: With dead ends: 387 [2023-02-15 20:07:22,578 INFO L226 Difference]: Without dead ends: 344 [2023-02-15 20:07:22,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 65 SyntacticMatches, 27 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2503, Invalid=12017, Unknown=0, NotChecked=0, Total=14520 [2023-02-15 20:07:22,579 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 332 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:22,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 262 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-02-15 20:07:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 85. [2023-02-15 20:07:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-15 20:07:22,802 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-15 20:07:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:22,802 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-15 20:07:22,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-15 20:07:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:07:22,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:22,803 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:22,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2023-02-15 20:07:23,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:23,008 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1782714204, now seen corresponding path program 60 times [2023-02-15 20:07:23,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:23,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677173798] [2023-02-15 20:07:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:23,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:23,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:23,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677173798] [2023-02-15 20:07:23,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677173798] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:23,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806176970] [2023-02-15 20:07:23,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:07:23,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:23,341 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:23,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2023-02-15 20:07:23,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-15 20:07:23,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:23,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:23,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:24,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806176970] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:24,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:24,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 56 [2023-02-15 20:07:24,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24883173] [2023-02-15 20:07:24,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:24,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-15 20:07:24,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-15 20:07:24,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 20:07:24,234 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:26,508 INFO L93 Difference]: Finished difference Result 436 states and 457 transitions. [2023-02-15 20:07:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-02-15 20:07:26,509 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 20:07:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:26,510 INFO L225 Difference]: With dead ends: 436 [2023-02-15 20:07:26,510 INFO L226 Difference]: Without dead ends: 393 [2023-02-15 20:07:26,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 66 SyntacticMatches, 27 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6441 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2628, Invalid=12624, Unknown=0, NotChecked=0, Total=15252 [2023-02-15 20:07:26,511 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 283 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:26,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 329 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-02-15 20:07:26,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 85. [2023-02-15 20:07:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:26,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-15 20:07:26,738 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-15 20:07:26,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:26,738 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-15 20:07:26,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:26,739 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-15 20:07:26,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:07:26,739 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:26,739 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:26,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2023-02-15 20:07:26,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2023-02-15 20:07:26,944 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:26,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:26,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1211895485, now seen corresponding path program 61 times [2023-02-15 20:07:26,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:26,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339236226] [2023-02-15 20:07:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:26,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 188 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:27,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:27,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339236226] [2023-02-15 20:07:27,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339236226] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:27,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8276377] [2023-02-15 20:07:27,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:07:27,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:27,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:27,259 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:27,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2023-02-15 20:07:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:27,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:27,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:27,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:28,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8276377] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:28,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:28,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 55 [2023-02-15 20:07:28,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501286819] [2023-02-15 20:07:28,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:28,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-15 20:07:28,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:28,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-15 20:07:28,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 20:07:28,045 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:30,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:30,289 INFO L93 Difference]: Finished difference Result 484 states and 506 transitions. [2023-02-15 20:07:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-15 20:07:30,290 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 20:07:30,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:30,291 INFO L225 Difference]: With dead ends: 484 [2023-02-15 20:07:30,291 INFO L226 Difference]: Without dead ends: 441 [2023-02-15 20:07:30,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 67 SyntacticMatches, 27 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6486 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2670, Invalid=12830, Unknown=0, NotChecked=0, Total=15500 [2023-02-15 20:07:30,292 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 331 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:30,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 262 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:30,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-02-15 20:07:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 85. [2023-02-15 20:07:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-15 20:07:30,517 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-15 20:07:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:30,517 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-15 20:07:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-15 20:07:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:07:30,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:30,518 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:30,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2023-02-15 20:07:30,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:30,722 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:30,723 INFO L85 PathProgramCache]: Analyzing trace with hash -884728004, now seen corresponding path program 62 times [2023-02-15 20:07:30,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:30,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815843313] [2023-02-15 20:07:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:30,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:31,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:31,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815843313] [2023-02-15 20:07:31,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815843313] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:31,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716552118] [2023-02-15 20:07:31,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:07:31,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:31,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:31,033 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:31,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2023-02-15 20:07:31,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:07:31,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:31,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:31,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:31,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:31,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716552118] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:31,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:31,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 54 [2023-02-15 20:07:31,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476486433] [2023-02-15 20:07:31,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:31,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-15 20:07:31,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:31,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-15 20:07:31,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 20:07:31,891 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:34,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:34,564 INFO L93 Difference]: Finished difference Result 531 states and 554 transitions. [2023-02-15 20:07:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-02-15 20:07:34,564 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 20:07:34,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:34,565 INFO L225 Difference]: With dead ends: 531 [2023-02-15 20:07:34,565 INFO L226 Difference]: Without dead ends: 488 [2023-02-15 20:07:34,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 68 SyntacticMatches, 27 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6341 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2626, Invalid=12626, Unknown=0, NotChecked=0, Total=15252 [2023-02-15 20:07:34,567 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 317 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:34,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 313 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-02-15 20:07:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 85. [2023-02-15 20:07:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-15 20:07:34,795 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-15 20:07:34,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:34,795 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-15 20:07:34,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-15 20:07:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:07:34,796 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:34,796 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:34,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2023-02-15 20:07:34,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:34,999 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:34,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:35,000 INFO L85 PathProgramCache]: Analyzing trace with hash -121077027, now seen corresponding path program 63 times [2023-02-15 20:07:35,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:35,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463636488] [2023-02-15 20:07:35,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:35,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:35,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:35,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463636488] [2023-02-15 20:07:35,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463636488] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:35,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078162751] [2023-02-15 20:07:35,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:07:35,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:35,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:35,290 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:35,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2023-02-15 20:07:35,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-02-15 20:07:35,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:35,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:35,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:35,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:36,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078162751] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:36,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:36,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 53 [2023-02-15 20:07:36,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792609667] [2023-02-15 20:07:36,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:36,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 20:07:36,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:36,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 20:07:36,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 20:07:36,005 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:38,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:38,751 INFO L93 Difference]: Finished difference Result 577 states and 601 transitions. [2023-02-15 20:07:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-15 20:07:38,752 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 20:07:38,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:38,753 INFO L225 Difference]: With dead ends: 577 [2023-02-15 20:07:38,753 INFO L226 Difference]: Without dead ends: 534 [2023-02-15 20:07:38,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 69 SyntacticMatches, 27 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6003 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2499, Invalid=12021, Unknown=0, NotChecked=0, Total=14520 [2023-02-15 20:07:38,754 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 342 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:38,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 335 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:38,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-02-15 20:07:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 85. [2023-02-15 20:07:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-15 20:07:38,985 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-15 20:07:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:38,986 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-15 20:07:38,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:38,986 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-15 20:07:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:07:38,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:38,986 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:38,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2023-02-15 20:07:39,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2023-02-15 20:07:39,191 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:39,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:39,192 INFO L85 PathProgramCache]: Analyzing trace with hash 457746204, now seen corresponding path program 64 times [2023-02-15 20:07:39,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:39,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133485134] [2023-02-15 20:07:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:39,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:39,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:39,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133485134] [2023-02-15 20:07:39,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133485134] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:39,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390842229] [2023-02-15 20:07:39,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:07:39,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:39,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:39,504 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:39,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2023-02-15 20:07:39,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:07:39,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:39,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:39,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:39,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:40,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390842229] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:40,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:40,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 52 [2023-02-15 20:07:40,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129878166] [2023-02-15 20:07:40,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:40,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 20:07:40,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:40,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 20:07:40,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 20:07:40,283 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:43,052 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2023-02-15 20:07:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-02-15 20:07:43,052 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 20:07:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:43,053 INFO L225 Difference]: With dead ends: 622 [2023-02-15 20:07:43,054 INFO L226 Difference]: Without dead ends: 579 [2023-02-15 20:07:43,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 70 SyntacticMatches, 27 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5480 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2298, Invalid=11042, Unknown=0, NotChecked=0, Total=13340 [2023-02-15 20:07:43,055 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 363 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:43,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 320 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-02-15 20:07:43,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 85. [2023-02-15 20:07:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-15 20:07:43,290 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-15 20:07:43,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:43,291 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-15 20:07:43,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-15 20:07:43,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:07:43,291 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:43,291 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:43,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2023-02-15 20:07:43,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:43,496 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash 337870589, now seen corresponding path program 65 times [2023-02-15 20:07:43,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:43,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997327604] [2023-02-15 20:07:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:43,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:43,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:43,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997327604] [2023-02-15 20:07:43,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997327604] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:43,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622638722] [2023-02-15 20:07:43,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:07:43,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:43,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:43,815 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:43,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2023-02-15 20:07:43,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-15 20:07:43,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:43,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:44,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:44,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622638722] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:44,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:44,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2023-02-15 20:07:44,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275130687] [2023-02-15 20:07:44,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:44,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-15 20:07:44,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:44,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-15 20:07:44,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 20:07:44,514 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:47,344 INFO L93 Difference]: Finished difference Result 666 states and 692 transitions. [2023-02-15 20:07:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-15 20:07:47,344 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 20:07:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:47,345 INFO L225 Difference]: With dead ends: 666 [2023-02-15 20:07:47,345 INFO L226 Difference]: Without dead ends: 623 [2023-02-15 20:07:47,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 71 SyntacticMatches, 27 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4792 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2038, Invalid=9734, Unknown=0, NotChecked=0, Total=11772 [2023-02-15 20:07:47,346 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 588 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:47,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 297 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-02-15 20:07:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 85. [2023-02-15 20:07:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-15 20:07:47,585 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-15 20:07:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:47,585 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-15 20:07:47,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-15 20:07:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:07:47,586 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:47,586 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:47,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2023-02-15 20:07:47,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:47,790 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:47,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1467111684, now seen corresponding path program 66 times [2023-02-15 20:07:47,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:47,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677660648] [2023-02-15 20:07:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:47,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:48,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:48,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677660648] [2023-02-15 20:07:48,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677660648] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:48,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566294597] [2023-02-15 20:07:48,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:07:48,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:48,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:48,119 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:48,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2023-02-15 20:07:48,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-15 20:07:48,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:48,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:48,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:48,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:48,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566294597] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:48,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:48,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2023-02-15 20:07:48,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335186328] [2023-02-15 20:07:48,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:48,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 20:07:48,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:48,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 20:07:48,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 20:07:48,954 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:51,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:51,868 INFO L93 Difference]: Finished difference Result 709 states and 736 transitions. [2023-02-15 20:07:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-15 20:07:51,889 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 20:07:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:51,890 INFO L225 Difference]: With dead ends: 709 [2023-02-15 20:07:51,890 INFO L226 Difference]: Without dead ends: 666 [2023-02-15 20:07:51,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 72 SyntacticMatches, 27 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1740, Invalid=8160, Unknown=0, NotChecked=0, Total=9900 [2023-02-15 20:07:51,891 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 489 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:51,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 307 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:51,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2023-02-15 20:07:52,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 85. [2023-02-15 20:07:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-02-15 20:07:52,208 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2023-02-15 20:07:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:52,208 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-02-15 20:07:52,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-02-15 20:07:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 20:07:52,210 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:52,210 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:52,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2023-02-15 20:07:52,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2023-02-15 20:07:52,415 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:52,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:52,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1940978915, now seen corresponding path program 12 times [2023-02-15 20:07:52,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:52,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828578789] [2023-02-15 20:07:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:52,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:52,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:52,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828578789] [2023-02-15 20:07:52,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828578789] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:52,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494997972] [2023-02-15 20:07:52,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:07:52,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:52,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:52,742 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:52,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2023-02-15 20:07:52,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-15 20:07:52,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:07:52,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:53,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:53,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494997972] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:53,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:53,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 49 [2023-02-15 20:07:53,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086474033] [2023-02-15 20:07:53,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:53,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 20:07:53,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:53,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 20:07:53,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1871, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 20:07:53,529 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:56,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:56,471 INFO L93 Difference]: Finished difference Result 754 states and 783 transitions. [2023-02-15 20:07:56,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-15 20:07:56,471 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 20:07:56,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:56,472 INFO L225 Difference]: With dead ends: 754 [2023-02-15 20:07:56,472 INFO L226 Difference]: Without dead ends: 711 [2023-02-15 20:07:56,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 73 SyntacticMatches, 27 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1445, Invalid=6387, Unknown=0, NotChecked=0, Total=7832 [2023-02-15 20:07:56,473 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 586 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:56,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 263 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2023-02-15 20:07:56,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 87. [2023-02-15 20:07:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.186046511627907) internal successors, (102), 86 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2023-02-15 20:07:56,721 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 59 [2023-02-15 20:07:56,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:56,722 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2023-02-15 20:07:56,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2023-02-15 20:07:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 20:07:56,722 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:56,722 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:56,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2023-02-15 20:07:56,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2023-02-15 20:07:56,926 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:56,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:56,927 INFO L85 PathProgramCache]: Analyzing trace with hash -794122025, now seen corresponding path program 24 times [2023-02-15 20:07:56,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:56,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131522384] [2023-02-15 20:07:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:56,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:57,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:57,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131522384] [2023-02-15 20:07:57,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131522384] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:57,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608027351] [2023-02-15 20:07:57,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:07:57,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:57,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:57,101 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:57,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2023-02-15 20:07:57,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-15 20:07:57,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:07:57,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:07:57,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:57,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:57,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608027351] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:57,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:57,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2023-02-15 20:07:57,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262504625] [2023-02-15 20:07:57,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:57,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 20:07:57,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:57,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 20:07:57,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2023-02-15 20:07:57,388 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:07:57,823 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2023-02-15 20:07:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 20:07:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-02-15 20:07:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:07:57,824 INFO L225 Difference]: With dead ends: 98 [2023-02-15 20:07:57,824 INFO L226 Difference]: Without dead ends: 96 [2023-02-15 20:07:57,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 104 SyntacticMatches, 26 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 20:07:57,824 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 88 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:07:57,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 164 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:07:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-15 20:07:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2023-02-15 20:07:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:58,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2023-02-15 20:07:58,079 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 60 [2023-02-15 20:07:58,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:07:58,079 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2023-02-15 20:07:58,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:07:58,080 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2023-02-15 20:07:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:07:58,080 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:07:58,080 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:07:58,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2023-02-15 20:07:58,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2023-02-15 20:07:58,285 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:07:58,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:07:58,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1004537287, now seen corresponding path program 25 times [2023-02-15 20:07:58,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:07:58,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934748906] [2023-02-15 20:07:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:07:58,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:07:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:58,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:07:58,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934748906] [2023-02-15 20:07:58,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934748906] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:07:58,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695202364] [2023-02-15 20:07:58,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:07:58,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:07:58,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:07:58,626 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:07:58,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2023-02-15 20:07:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:07:58,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:07:58,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:07:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:59,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:07:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:07:59,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695202364] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:07:59,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:07:59,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2023-02-15 20:07:59,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414467157] [2023-02-15 20:07:59,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:07:59,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-15 20:07:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:07:59,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-15 20:07:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3369, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 20:07:59,657 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:00,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:00,644 INFO L93 Difference]: Finished difference Result 194 states and 211 transitions. [2023-02-15 20:08:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 20:08:00,644 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:08:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:00,645 INFO L225 Difference]: With dead ends: 194 [2023-02-15 20:08:00,645 INFO L226 Difference]: Without dead ends: 148 [2023-02-15 20:08:00,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 65 SyntacticMatches, 29 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1650, Invalid=7280, Unknown=0, NotChecked=0, Total=8930 [2023-02-15 20:08:00,646 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:00,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 314 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:08:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-15 20:08:00,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 91. [2023-02-15 20:08:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-15 20:08:00,925 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-15 20:08:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:00,925 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-15 20:08:00,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-15 20:08:00,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:08:00,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:00,926 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:00,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2023-02-15 20:08:01,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:01,130 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:01,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:01,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1170782200, now seen corresponding path program 67 times [2023-02-15 20:08:01,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:01,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000619817] [2023-02-15 20:08:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:01,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:01,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:01,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000619817] [2023-02-15 20:08:01,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000619817] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:01,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343745088] [2023-02-15 20:08:01,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:08:01,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:01,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:01,391 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:01,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2023-02-15 20:08:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:01,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:08:01,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:02,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:02,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343745088] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:02,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:02,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2023-02-15 20:08:02,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16935782] [2023-02-15 20:08:02,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:02,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-15 20:08:02,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:02,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-15 20:08:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=3284, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 20:08:02,410 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:03,759 INFO L93 Difference]: Finished difference Result 251 states and 269 transitions. [2023-02-15 20:08:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 20:08:03,759 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:08:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:03,759 INFO L225 Difference]: With dead ends: 251 [2023-02-15 20:08:03,759 INFO L226 Difference]: Without dead ends: 205 [2023-02-15 20:08:03,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 66 SyntacticMatches, 29 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5431 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1994, Invalid=9348, Unknown=0, NotChecked=0, Total=11342 [2023-02-15 20:08:03,760 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:03,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 293 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:08:03,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-15 20:08:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 91. [2023-02-15 20:08:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-15 20:08:04,052 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-15 20:08:04,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:04,052 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-15 20:08:04,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-15 20:08:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:08:04,052 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:04,052 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:04,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2023-02-15 20:08:04,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2023-02-15 20:08:04,257 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:04,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1933690457, now seen corresponding path program 68 times [2023-02-15 20:08:04,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:04,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460199327] [2023-02-15 20:08:04,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:04,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:04,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:04,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460199327] [2023-02-15 20:08:04,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460199327] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:04,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930669626] [2023-02-15 20:08:04,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:08:04,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:04,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:04,563 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:04,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2023-02-15 20:08:04,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:08:04,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:08:04,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:08:04,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:05,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:05,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930669626] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:05,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:05,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 63 [2023-02-15 20:08:05,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436509083] [2023-02-15 20:08:05,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:05,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-15 20:08:05,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:05,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-15 20:08:05,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=3197, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 20:08:05,528 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:07,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:07,422 INFO L93 Difference]: Finished difference Result 307 states and 326 transitions. [2023-02-15 20:08:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-15 20:08:07,422 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:08:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:07,423 INFO L225 Difference]: With dead ends: 307 [2023-02-15 20:08:07,423 INFO L226 Difference]: Without dead ends: 261 [2023-02-15 20:08:07,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 67 SyntacticMatches, 29 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6177 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2348, Invalid=11224, Unknown=0, NotChecked=0, Total=13572 [2023-02-15 20:08:07,424 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 202 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:07,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 236 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:08:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-02-15 20:08:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 91. [2023-02-15 20:08:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-15 20:08:07,741 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-15 20:08:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:07,741 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-15 20:08:07,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-15 20:08:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:08:07,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:07,742 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:07,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2023-02-15 20:08:07,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2023-02-15 20:08:07,947 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:07,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1127016408, now seen corresponding path program 69 times [2023-02-15 20:08:07,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:07,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943282953] [2023-02-15 20:08:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:07,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:08,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:08,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943282953] [2023-02-15 20:08:08,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943282953] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:08,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417944754] [2023-02-15 20:08:08,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:08:08,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:08,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:08,268 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:08,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2023-02-15 20:08:08,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-02-15 20:08:08,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:08:08,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:08:08,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:08,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:09,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417944754] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:09,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:09,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2023-02-15 20:08:09,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107521664] [2023-02-15 20:08:09,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:09,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-15 20:08:09,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:09,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-15 20:08:09,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=3108, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 20:08:09,148 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:11,477 INFO L93 Difference]: Finished difference Result 362 states and 382 transitions. [2023-02-15 20:08:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-15 20:08:11,477 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:08:11,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:11,478 INFO L225 Difference]: With dead ends: 362 [2023-02-15 20:08:11,478 INFO L226 Difference]: Without dead ends: 316 [2023-02-15 20:08:11,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 68 SyntacticMatches, 29 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6828 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2667, Invalid=12833, Unknown=0, NotChecked=0, Total=15500 [2023-02-15 20:08:11,479 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 196 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:11,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 320 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:08:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-02-15 20:08:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 91. [2023-02-15 20:08:11,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:11,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-15 20:08:11,788 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-15 20:08:11,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:11,789 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-15 20:08:11,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:11,789 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-15 20:08:11,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:08:11,789 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:11,789 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:11,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2023-02-15 20:08:11,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:11,994 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:11,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1655183993, now seen corresponding path program 70 times [2023-02-15 20:08:11,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:11,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145000764] [2023-02-15 20:08:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:11,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:12,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:12,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145000764] [2023-02-15 20:08:12,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145000764] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:12,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679152505] [2023-02-15 20:08:12,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:08:12,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:12,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:12,334 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:12,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2023-02-15 20:08:12,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:08:12,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:08:12,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:08:12,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:12,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:13,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679152505] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:13,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:13,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2023-02-15 20:08:13,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432872927] [2023-02-15 20:08:13,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:13,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-15 20:08:13,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:13,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-15 20:08:13,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=3017, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 20:08:13,286 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:15,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:15,992 INFO L93 Difference]: Finished difference Result 416 states and 437 transitions. [2023-02-15 20:08:15,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-15 20:08:15,992 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:08:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:15,993 INFO L225 Difference]: With dead ends: 416 [2023-02-15 20:08:15,993 INFO L226 Difference]: Without dead ends: 370 [2023-02-15 20:08:15,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 69 SyntacticMatches, 29 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7349 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2927, Invalid=14103, Unknown=0, NotChecked=0, Total=17030 [2023-02-15 20:08:15,994 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 198 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:15,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 425 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:08:15,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-02-15 20:08:16,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 91. [2023-02-15 20:08:16,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-15 20:08:16,321 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-15 20:08:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:16,322 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-15 20:08:16,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-15 20:08:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:08:16,322 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:16,322 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:16,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2023-02-15 20:08:16,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:16,527 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash 563843000, now seen corresponding path program 71 times [2023-02-15 20:08:16,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:16,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728796267] [2023-02-15 20:08:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:16,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:16,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:16,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728796267] [2023-02-15 20:08:16,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728796267] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:16,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739821725] [2023-02-15 20:08:16,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:08:16,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:16,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:16,836 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:16,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2023-02-15 20:08:16,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-02-15 20:08:16,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:08:16,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:08:16,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:17,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:17,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739821725] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:17,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:17,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 60 [2023-02-15 20:08:17,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819842289] [2023-02-15 20:08:17,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:17,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-15 20:08:17,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:17,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-15 20:08:17,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=2924, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 20:08:17,475 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:20,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:20,418 INFO L93 Difference]: Finished difference Result 469 states and 491 transitions. [2023-02-15 20:08:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-15 20:08:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:08:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:20,419 INFO L225 Difference]: With dead ends: 469 [2023-02-15 20:08:20,419 INFO L226 Difference]: Without dead ends: 423 [2023-02-15 20:08:20,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 70 SyntacticMatches, 29 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7702 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3110, Invalid=14980, Unknown=0, NotChecked=0, Total=18090 [2023-02-15 20:08:20,420 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 265 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:20,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 316 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:08:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-02-15 20:08:20,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 91. [2023-02-15 20:08:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-15 20:08:20,738 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-15 20:08:20,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:20,739 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-15 20:08:20,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:20,739 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-15 20:08:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:08:20,739 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:20,739 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:20,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2023-02-15 20:08:20,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2023-02-15 20:08:20,944 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:20,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1775564441, now seen corresponding path program 72 times [2023-02-15 20:08:20,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:20,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851411021] [2023-02-15 20:08:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:20,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:21,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:21,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851411021] [2023-02-15 20:08:21,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851411021] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:21,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150615198] [2023-02-15 20:08:21,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:08:21,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:21,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:21,263 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:21,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2023-02-15 20:08:21,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-02-15 20:08:21,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:08:21,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:08:21,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:21,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:22,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150615198] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:22,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:22,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 59 [2023-02-15 20:08:22,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874278892] [2023-02-15 20:08:22,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:22,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-15 20:08:22,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:22,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-15 20:08:22,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=2829, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 20:08:22,185 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:25,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:25,496 INFO L93 Difference]: Finished difference Result 521 states and 544 transitions. [2023-02-15 20:08:25,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-02-15 20:08:25,497 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:08:25,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:25,497 INFO L225 Difference]: With dead ends: 521 [2023-02-15 20:08:25,498 INFO L226 Difference]: Without dead ends: 475 [2023-02-15 20:08:25,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 71 SyntacticMatches, 29 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7861 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3204, Invalid=15428, Unknown=0, NotChecked=0, Total=18632 [2023-02-15 20:08:25,499 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 346 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:25,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 277 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:08:25,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-02-15 20:08:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 91. [2023-02-15 20:08:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-15 20:08:25,824 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-15 20:08:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:25,824 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-15 20:08:25,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-15 20:08:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:08:25,824 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:25,825 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:25,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2023-02-15 20:08:26,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:26,029 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash 290631576, now seen corresponding path program 73 times [2023-02-15 20:08:26,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:26,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145786876] [2023-02-15 20:08:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:26,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:26,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:26,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145786876] [2023-02-15 20:08:26,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145786876] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:26,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496551258] [2023-02-15 20:08:26,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:08:26,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:26,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:26,389 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:26,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2023-02-15 20:08:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:26,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:08:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:27,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:27,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496551258] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:27,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:27,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 58 [2023-02-15 20:08:27,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508700982] [2023-02-15 20:08:27,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:27,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-15 20:08:27,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:27,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-15 20:08:27,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2732, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 20:08:27,360 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:30,895 INFO L93 Difference]: Finished difference Result 572 states and 596 transitions. [2023-02-15 20:08:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-15 20:08:30,896 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:08:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:30,898 INFO L225 Difference]: With dead ends: 572 [2023-02-15 20:08:30,898 INFO L226 Difference]: Without dead ends: 526 [2023-02-15 20:08:30,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 72 SyntacticMatches, 29 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3203, Invalid=15429, Unknown=0, NotChecked=0, Total=18632 [2023-02-15 20:08:30,899 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 382 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:30,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 397 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:08:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-02-15 20:08:31,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 91. [2023-02-15 20:08:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-15 20:08:31,223 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-15 20:08:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:31,223 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-15 20:08:31,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-15 20:08:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:08:31,223 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:31,223 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:31,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2023-02-15 20:08:31,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2023-02-15 20:08:31,428 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:31,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:31,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1489656505, now seen corresponding path program 74 times [2023-02-15 20:08:31,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:31,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623119351] [2023-02-15 20:08:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:31,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:31,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:31,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623119351] [2023-02-15 20:08:31,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623119351] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:31,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450684073] [2023-02-15 20:08:31,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:08:31,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:31,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:31,782 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:31,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2023-02-15 20:08:31,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:08:31,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:08:31,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:08:31,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:32,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:32,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450684073] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:32,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:32,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 57 [2023-02-15 20:08:32,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487156412] [2023-02-15 20:08:32,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:32,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-15 20:08:32,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:32,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-15 20:08:32,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 20:08:32,582 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:36,126 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2023-02-15 20:08:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-15 20:08:36,127 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:08:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:36,127 INFO L225 Difference]: With dead ends: 622 [2023-02-15 20:08:36,127 INFO L226 Difference]: Without dead ends: 576 [2023-02-15 20:08:36,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 73 SyntacticMatches, 29 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7549 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3107, Invalid=14983, Unknown=0, NotChecked=0, Total=18090 [2023-02-15 20:08:36,129 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 414 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:36,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 293 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:08:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2023-02-15 20:08:36,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 91. [2023-02-15 20:08:36,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-15 20:08:36,458 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-15 20:08:36,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:36,458 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-15 20:08:36,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-15 20:08:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:08:36,459 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:36,459 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:36,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2023-02-15 20:08:36,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2023-02-15 20:08:36,663 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:36,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:36,663 INFO L85 PathProgramCache]: Analyzing trace with hash 974145400, now seen corresponding path program 75 times [2023-02-15 20:08:36,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:36,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405800651] [2023-02-15 20:08:36,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:36,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:36,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:36,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405800651] [2023-02-15 20:08:36,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405800651] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:36,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381305339] [2023-02-15 20:08:36,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:08:36,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:36,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:36,972 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:36,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2023-02-15 20:08:37,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-02-15 20:08:37,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:08:37,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:08:37,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:37,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:37,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381305339] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:37,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:37,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 56 [2023-02-15 20:08:37,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867723152] [2023-02-15 20:08:37,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:37,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-15 20:08:37,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:37,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-15 20:08:37,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 20:08:37,815 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:41,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:41,704 INFO L93 Difference]: Finished difference Result 671 states and 697 transitions. [2023-02-15 20:08:41,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-02-15 20:08:41,704 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:08:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:41,705 INFO L225 Difference]: With dead ends: 671 [2023-02-15 20:08:41,705 INFO L226 Difference]: Without dead ends: 625 [2023-02-15 20:08:41,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 74 SyntacticMatches, 29 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7074 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2922, Invalid=14108, Unknown=0, NotChecked=0, Total=17030 [2023-02-15 20:08:41,706 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 403 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:41,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 326 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:08:41,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-02-15 20:08:42,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 91. [2023-02-15 20:08:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-15 20:08:42,039 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-15 20:08:42,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:42,040 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-15 20:08:42,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-15 20:08:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:08:42,040 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:42,040 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:42,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2023-02-15 20:08:42,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:42,244 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:42,245 INFO L85 PathProgramCache]: Analyzing trace with hash 403326681, now seen corresponding path program 76 times [2023-02-15 20:08:42,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:42,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358158549] [2023-02-15 20:08:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:42,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:42,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358158549] [2023-02-15 20:08:42,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358158549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56792458] [2023-02-15 20:08:42,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:08:42,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:42,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:42,567 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:42,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2023-02-15 20:08:42,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:08:42,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:08:42,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:08:42,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:43,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:43,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56792458] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:43,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:43,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 55 [2023-02-15 20:08:43,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487032090] [2023-02-15 20:08:43,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:43,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-15 20:08:43,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-15 20:08:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 20:08:43,382 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:47,310 INFO L93 Difference]: Finished difference Result 719 states and 746 transitions. [2023-02-15 20:08:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-15 20:08:47,311 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:08:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:47,311 INFO L225 Difference]: With dead ends: 719 [2023-02-15 20:08:47,311 INFO L226 Difference]: Without dead ends: 673 [2023-02-15 20:08:47,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 75 SyntacticMatches, 29 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6401 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2660, Invalid=12840, Unknown=0, NotChecked=0, Total=15500 [2023-02-15 20:08:47,313 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 448 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:47,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 326 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:08:47,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2023-02-15 20:08:47,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 91. [2023-02-15 20:08:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-15 20:08:47,652 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-15 20:08:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:47,653 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-15 20:08:47,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-15 20:08:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:08:47,653 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:47,653 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:47,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2023-02-15 20:08:47,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2023-02-15 20:08:47,857 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:47,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1693296808, now seen corresponding path program 77 times [2023-02-15 20:08:47,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:47,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128687560] [2023-02-15 20:08:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:47,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:48,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:48,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128687560] [2023-02-15 20:08:48,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128687560] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:48,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845170599] [2023-02-15 20:08:48,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:08:48,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:48,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:48,210 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:48,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2023-02-15 20:08:48,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-02-15 20:08:48,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:08:48,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:08:48,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:48,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:48,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845170599] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:48,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:48,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 54 [2023-02-15 20:08:48,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534909967] [2023-02-15 20:08:48,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:48,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-15 20:08:48,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:48,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-15 20:08:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2324, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 20:08:48,918 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:52,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:52,932 INFO L93 Difference]: Finished difference Result 766 states and 794 transitions. [2023-02-15 20:08:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-15 20:08:52,932 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:08:52,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:52,933 INFO L225 Difference]: With dead ends: 766 [2023-02-15 20:08:52,933 INFO L226 Difference]: Without dead ends: 720 [2023-02-15 20:08:52,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 76 SyntacticMatches, 29 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2339, Invalid=11233, Unknown=0, NotChecked=0, Total=13572 [2023-02-15 20:08:52,934 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 485 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:52,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 318 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:08:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2023-02-15 20:08:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 91. [2023-02-15 20:08:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:53,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-15 20:08:53,273 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-15 20:08:53,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:53,273 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-15 20:08:53,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-15 20:08:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:08:53,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:53,274 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:53,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2023-02-15 20:08:53,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2023-02-15 20:08:53,477 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:53,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:53,478 INFO L85 PathProgramCache]: Analyzing trace with hash -929645831, now seen corresponding path program 78 times [2023-02-15 20:08:53,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:53,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432871709] [2023-02-15 20:08:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:53,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:53,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:53,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432871709] [2023-02-15 20:08:53,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432871709] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:53,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043597756] [2023-02-15 20:08:53,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:08:53,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:53,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:53,793 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:53,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2023-02-15 20:08:53,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-02-15 20:08:53,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:08:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:08:53,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:08:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:54,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:08:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:54,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043597756] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:08:54,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:08:54,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2023-02-15 20:08:54,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758057895] [2023-02-15 20:08:54,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:08:54,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 20:08:54,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:08:54,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 20:08:54,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 20:08:54,691 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:58,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:08:58,865 INFO L93 Difference]: Finished difference Result 812 states and 841 transitions. [2023-02-15 20:08:58,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-15 20:08:58,865 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:08:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:08:58,866 INFO L225 Difference]: With dead ends: 812 [2023-02-15 20:08:58,866 INFO L226 Difference]: Without dead ends: 766 [2023-02-15 20:08:58,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 77 SyntacticMatches, 29 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4547 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1983, Invalid=9359, Unknown=0, NotChecked=0, Total=11342 [2023-02-15 20:08:58,867 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 406 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:08:58,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 399 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:08:58,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2023-02-15 20:08:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 91. [2023-02-15 20:08:59,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-02-15 20:08:59,233 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2023-02-15 20:08:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:08:59,233 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-02-15 20:08:59,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:08:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-02-15 20:08:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 20:08:59,233 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:08:59,234 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:08:59,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2023-02-15 20:08:59,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:59,439 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:08:59,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:08:59,439 INFO L85 PathProgramCache]: Analyzing trace with hash -350822600, now seen corresponding path program 13 times [2023-02-15 20:08:59,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:08:59,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12959338] [2023-02-15 20:08:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:08:59,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:08:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:08:59,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:08:59,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12959338] [2023-02-15 20:08:59,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12959338] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:08:59,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755204869] [2023-02-15 20:08:59,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:08:59,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:08:59,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:08:59,805 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:08:59,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2023-02-15 20:08:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:08:59,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 20:08:59,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:09:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:00,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:09:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:00,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755204869] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:09:00,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:09:00,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 52 [2023-02-15 20:09:00,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804239543] [2023-02-15 20:09:00,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:09:00,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 20:09:00,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:09:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 20:09:00,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=2108, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 20:09:00,679 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:04,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:09:04,920 INFO L93 Difference]: Finished difference Result 860 states and 891 transitions. [2023-02-15 20:09:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-15 20:09:04,920 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 20:09:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:09:04,922 INFO L225 Difference]: With dead ends: 860 [2023-02-15 20:09:04,922 INFO L226 Difference]: Without dead ends: 814 [2023-02-15 20:09:04,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 78 SyntacticMatches, 29 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3489 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1637, Invalid=7293, Unknown=0, NotChecked=0, Total=8930 [2023-02-15 20:09:04,922 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 447 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:09:04,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 356 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:09:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2023-02-15 20:09:05,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 93. [2023-02-15 20:09:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2023-02-15 20:09:05,271 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 63 [2023-02-15 20:09:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:09:05,271 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2023-02-15 20:09:05,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2023-02-15 20:09:05,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 20:09:05,272 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:09:05,272 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:09:05,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2023-02-15 20:09:05,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:09:05,476 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:09:05,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:09:05,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2032864333, now seen corresponding path program 26 times [2023-02-15 20:09:05,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:09:05,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442359621] [2023-02-15 20:09:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:09:05,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:09:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:09:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:05,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:09:05,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442359621] [2023-02-15 20:09:05,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442359621] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:09:05,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819058502] [2023-02-15 20:09:05,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:09:05,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:09:05,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:09:05,668 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:09:05,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2023-02-15 20:09:05,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:09:05,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:09:05,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 20:09:05,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:09:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:05,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:09:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:05,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819058502] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:09:05,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:09:05,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2023-02-15 20:09:05,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890162894] [2023-02-15 20:09:05,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:09:05,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 20:09:05,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:09:05,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 20:09:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2023-02-15 20:09:05,977 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 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 20:09:06,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:09:06,526 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2023-02-15 20:09:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 20:09:06,527 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 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 64 [2023-02-15 20:09:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:09:06,527 INFO L225 Difference]: With dead ends: 104 [2023-02-15 20:09:06,527 INFO L226 Difference]: Without dead ends: 102 [2023-02-15 20:09:06,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 111 SyntacticMatches, 28 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 20:09:06,528 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 66 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:09:06,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 236 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:09:06,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-15 20:09:06,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2023-02-15 20:09:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 95 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2023-02-15 20:09:06,894 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 64 [2023-02-15 20:09:06,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:09:06,894 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2023-02-15 20:09:06,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 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 20:09:06,894 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2023-02-15 20:09:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 20:09:06,895 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:09:06,895 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:09:06,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2023-02-15 20:09:07,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2023-02-15 20:09:07,099 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:09:07,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:09:07,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2017627683, now seen corresponding path program 27 times [2023-02-15 20:09:07,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:09:07,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15458736] [2023-02-15 20:09:07,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:09:07,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:09:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:09:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:07,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:09:07,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15458736] [2023-02-15 20:09:07,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15458736] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:09:07,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856639042] [2023-02-15 20:09:07,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:09:07,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:09:07,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:09:07,477 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:09:07,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2023-02-15 20:09:07,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-15 20:09:07,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:09:07,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 20:09:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:09:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:08,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:09:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:08,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856639042] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:09:08,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:09:08,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2023-02-15 20:09:08,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390179613] [2023-02-15 20:09:08,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:09:08,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-15 20:09:08,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:09:08,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-15 20:09:08,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=3801, Unknown=0, NotChecked=0, Total=4692 [2023-02-15 20:09:08,417 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:09:09,750 INFO L93 Difference]: Finished difference Result 207 states and 225 transitions. [2023-02-15 20:09:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 20:09:09,750 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-15 20:09:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:09:09,750 INFO L225 Difference]: With dead ends: 207 [2023-02-15 20:09:09,750 INFO L226 Difference]: Without dead ends: 158 [2023-02-15 20:09:09,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 69 SyntacticMatches, 31 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5298 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1855, Invalid=8245, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 20:09:09,752 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:09:09,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 235 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:09:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-15 20:09:10,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2023-02-15 20:09:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-15 20:09:10,158 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-15 20:09:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:09:10,159 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-15 20:09:10,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-15 20:09:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 20:09:10,159 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:09:10,159 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:09:10,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2023-02-15 20:09:10,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2023-02-15 20:09:10,364 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:09:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:09:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1732458524, now seen corresponding path program 79 times [2023-02-15 20:09:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:09:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111142111] [2023-02-15 20:09:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:09:10,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:09:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:09:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 261 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:10,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:09:10,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111142111] [2023-02-15 20:09:10,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111142111] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:09:10,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131730738] [2023-02-15 20:09:10,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:09:10,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:09:10,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:09:10,721 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:09:10,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2023-02-15 20:09:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:09:10,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 20:09:10,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:09:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:11,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:09:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:11,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131730738] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:09:11,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:09:11,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 68 [2023-02-15 20:09:11,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080297167] [2023-02-15 20:09:11,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:09:11,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-15 20:09:11,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:09:11,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-15 20:09:11,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=3711, Unknown=0, NotChecked=0, Total=4556 [2023-02-15 20:09:11,721 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:13,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:09:13,513 INFO L93 Difference]: Finished difference Result 268 states and 287 transitions. [2023-02-15 20:09:13,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-15 20:09:13,513 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-15 20:09:13,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:09:13,514 INFO L225 Difference]: With dead ends: 268 [2023-02-15 20:09:13,514 INFO L226 Difference]: Without dead ends: 219 [2023-02-15 20:09:13,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 70 SyntacticMatches, 31 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6218 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2254, Invalid=10628, Unknown=0, NotChecked=0, Total=12882 [2023-02-15 20:09:13,515 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 103 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:09:13,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 247 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:09:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-02-15 20:09:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 97. [2023-02-15 20:09:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-15 20:09:13,950 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-15 20:09:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:09:13,950 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-15 20:09:13,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:13,950 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-15 20:09:13,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 20:09:13,951 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:09:13,951 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:09:13,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2023-02-15 20:09:14,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:09:14,155 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:09:14,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:09:14,156 INFO L85 PathProgramCache]: Analyzing trace with hash -86233603, now seen corresponding path program 80 times [2023-02-15 20:09:14,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:09:14,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626236404] [2023-02-15 20:09:14,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:09:14,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:09:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:09:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 261 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:14,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:09:14,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626236404] [2023-02-15 20:09:14,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626236404] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:09:14,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524339804] [2023-02-15 20:09:14,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:09:14,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:09:14,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:09:14,584 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:09:14,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2023-02-15 20:09:14,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:09:14,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:09:14,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 20:09:14,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:09:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:15,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:09:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:15,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524339804] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:09:15,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:09:15,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 67 [2023-02-15 20:09:15,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100018831] [2023-02-15 20:09:15,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:09:15,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-15 20:09:15,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:09:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-15 20:09:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=3619, Unknown=0, NotChecked=0, Total=4422 [2023-02-15 20:09:15,524 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:09:17,781 INFO L93 Difference]: Finished difference Result 328 states and 348 transitions. [2023-02-15 20:09:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-15 20:09:17,781 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-15 20:09:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:09:17,789 INFO L225 Difference]: With dead ends: 328 [2023-02-15 20:09:17,789 INFO L226 Difference]: Without dead ends: 279 [2023-02-15 20:09:17,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 71 SyntacticMatches, 31 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7107 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2671, Invalid=12829, Unknown=0, NotChecked=0, Total=15500 [2023-02-15 20:09:17,790 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:09:17,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 293 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:09:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-02-15 20:09:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 97. [2023-02-15 20:09:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-15 20:09:18,239 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-15 20:09:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:09:18,239 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-15 20:09:18,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:18,239 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-15 20:09:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 20:09:18,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:09:18,240 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:09:18,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2023-02-15 20:09:18,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:09:18,444 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:09:18,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:09:18,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1253279748, now seen corresponding path program 81 times [2023-02-15 20:09:18,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:09:18,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097484620] [2023-02-15 20:09:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:09:18,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:09:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:09:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 261 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:18,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:09:18,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097484620] [2023-02-15 20:09:18,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097484620] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:09:18,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620981285] [2023-02-15 20:09:18,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:09:18,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:09:18,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:09:18,846 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:09:18,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2023-02-15 20:09:18,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-15 20:09:18,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:09:18,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 20:09:18,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:09:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:19,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:09:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:19,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620981285] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:09:19,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:09:19,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 66 [2023-02-15 20:09:19,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697603649] [2023-02-15 20:09:19,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:09:19,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-15 20:09:19,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:09:19,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-15 20:09:19,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3525, Unknown=0, NotChecked=0, Total=4290 [2023-02-15 20:09:19,872 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:22,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:09:22,885 INFO L93 Difference]: Finished difference Result 387 states and 408 transitions. [2023-02-15 20:09:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-02-15 20:09:22,885 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-15 20:09:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:09:22,886 INFO L225 Difference]: With dead ends: 387 [2023-02-15 20:09:22,886 INFO L226 Difference]: Without dead ends: 338 [2023-02-15 20:09:22,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 72 SyntacticMatches, 31 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7907 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3057, Invalid=14765, Unknown=0, NotChecked=0, Total=17822 [2023-02-15 20:09:22,887 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 203 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:09:22,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 293 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:09:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-02-15 20:09:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 97. [2023-02-15 20:09:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-15 20:09:23,328 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-15 20:09:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:09:23,328 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-15 20:09:23,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-15 20:09:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 20:09:23,328 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:09:23,328 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:09:23,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2023-02-15 20:09:23,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:09:23,533 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:09:23,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:09:23,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1757114909, now seen corresponding path program 82 times [2023-02-15 20:09:23,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:09:23,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775123298] [2023-02-15 20:09:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:09:23,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:09:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:09:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:23,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:09:23,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775123298] [2023-02-15 20:09:23,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775123298] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:09:23,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124450974] [2023-02-15 20:09:23,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:09:23,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:09:23,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:09:23,929 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:09:23,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2023-02-15 20:09:23,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:09:23,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:09:23,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 20:09:23,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:09:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:24,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:09:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:24,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124450974] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:09:24,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:09:24,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 65 [2023-02-15 20:09:24,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769057072] [2023-02-15 20:09:24,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:09:24,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-15 20:09:24,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:09:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-15 20:09:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 20:09:24,868 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:09:28,366 INFO L93 Difference]: Finished difference Result 445 states and 467 transitions. [2023-02-15 20:09:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-15 20:09:28,367 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-15 20:09:28,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:09:28,367 INFO L225 Difference]: With dead ends: 445 [2023-02-15 20:09:28,367 INFO L226 Difference]: Without dead ends: 396 [2023-02-15 20:09:28,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 73 SyntacticMatches, 31 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8578 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3385, Invalid=16355, Unknown=0, NotChecked=0, Total=19740 [2023-02-15 20:09:28,368 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 268 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:09:28,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 335 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:09:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-02-15 20:09:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 97. [2023-02-15 20:09:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-15 20:09:28,802 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-15 20:09:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:09:28,802 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-15 20:09:28,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-15 20:09:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 20:09:28,802 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:09:28,802 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:09:28,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2023-02-15 20:09:29,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2023-02-15 20:09:29,007 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:09:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:09:29,007 INFO L85 PathProgramCache]: Analyzing trace with hash -362532900, now seen corresponding path program 83 times [2023-02-15 20:09:29,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:09:29,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132642569] [2023-02-15 20:09:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:09:29,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:09:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:09:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 261 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:29,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:09:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132642569] [2023-02-15 20:09:29,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132642569] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:09:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825557856] [2023-02-15 20:09:29,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:09:29,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:09:29,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:09:29,398 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:09:29,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2023-02-15 20:09:29,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-02-15 20:09:29,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:09:29,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 20:09:29,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:09:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:30,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:09:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:30,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825557856] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:09:30,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:09:30,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 64 [2023-02-15 20:09:30,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587989286] [2023-02-15 20:09:30,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:09:30,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-15 20:09:30,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:09:30,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-15 20:09:30,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=3331, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 20:09:30,473 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:09:34,223 INFO L93 Difference]: Finished difference Result 502 states and 525 transitions. [2023-02-15 20:09:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-02-15 20:09:34,223 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-15 20:09:34,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:09:34,224 INFO L225 Difference]: With dead ends: 502 [2023-02-15 20:09:34,224 INFO L226 Difference]: Without dead ends: 453 [2023-02-15 20:09:34,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 74 SyntacticMatches, 31 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9076 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3634, Invalid=17536, Unknown=0, NotChecked=0, Total=21170 [2023-02-15 20:09:34,225 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 287 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:09:34,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 356 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:09:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-02-15 20:09:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 97. [2023-02-15 20:09:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-15 20:09:34,675 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-15 20:09:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:09:34,676 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-15 20:09:34,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-15 20:09:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 20:09:34,676 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:09:34,676 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:09:34,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2023-02-15 20:09:34,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2023-02-15 20:09:34,881 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:09:34,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:09:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash 400375357, now seen corresponding path program 84 times [2023-02-15 20:09:34,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:09:34,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150647096] [2023-02-15 20:09:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:09:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:09:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:09:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 261 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:35,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:09:35,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150647096] [2023-02-15 20:09:35,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150647096] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:09:35,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022051059] [2023-02-15 20:09:35,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:09:35,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:09:35,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:09:35,225 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:09:35,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2023-02-15 20:09:35,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-02-15 20:09:35,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:09:35,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 20:09:35,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:09:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:35,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:09:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:36,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022051059] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:09:36,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:09:36,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 63 [2023-02-15 20:09:36,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942616905] [2023-02-15 20:09:36,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:09:36,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-15 20:09:36,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:09:36,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-15 20:09:36,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3231, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 20:09:36,193 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:40,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:09:40,558 INFO L93 Difference]: Finished difference Result 558 states and 582 transitions. [2023-02-15 20:09:40,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-15 20:09:40,559 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-15 20:09:40,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:09:40,559 INFO L225 Difference]: With dead ends: 558 [2023-02-15 20:09:40,559 INFO L226 Difference]: Without dead ends: 509 [2023-02-15 20:09:40,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 75 SyntacticMatches, 31 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9369 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3789, Invalid=18263, Unknown=0, NotChecked=0, Total=22052 [2023-02-15 20:09:40,561 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 388 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:09:40,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 391 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:09:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-02-15 20:09:41,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 97. [2023-02-15 20:09:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-02-15 20:09:41,007 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2023-02-15 20:09:41,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:09:41,007 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-02-15 20:09:41,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:09:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-02-15 20:09:41,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 20:09:41,007 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:09:41,008 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:09:41,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2023-02-15 20:09:41,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2023-02-15 20:09:41,212 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:09:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:09:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash -406298692, now seen corresponding path program 85 times [2023-02-15 20:09:41,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:09:41,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188680818] [2023-02-15 20:09:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:09:41,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:09:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:09:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 261 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:41,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:09:41,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188680818] [2023-02-15 20:09:41,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188680818] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:09:41,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186356914] [2023-02-15 20:09:41,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:09:41,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:09:41,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:09:41,616 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:09:41,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2023-02-15 20:09:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:09:41,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 20:09:41,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:09:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:42,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:09:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:09:42,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186356914] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:09:42,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:09:42,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 62 [2023-02-15 20:09:42,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502112291] [2023-02-15 20:09:42,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:09:42,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-15 20:09:42,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:09:42,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-15 20:09:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 20:09:42,692 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)